夏季学期实训-基础数据结构（栈与队列）

A：HDU 1072 （易）

 1 /**************************************************
 2  * Author     : xiaohao Z
 3  * Blog     : http://www.cnblogs.com/shu-xiaohao/
 4  * Last modified : 2014-07-03 09:37
 5  * Filename     : hdu_1072.cpp
 6  * Description     : 
 7  * ************************************************/
 8 
 9 #include <iostream>
10 #include <cstdio>
11 #include <cstring>
12 #include <cstdlib>
13 #include <cmath>
14 #include <algorithm>
15 #include <queue>
16 #include <stack>
17 #include <vector>
18 #include <set>
19 #include <map>
20 #define MP(a, b) make_pair(a, b)
21 #define PB(a) push_back(a)
22 
23 using namespace std;
24 typedef long long ll;
25 typedef pair<int, int> pii;
26 typedef pair<unsigned int,unsigned int> puu;
27 typedef pair<int, double> pid;
28 typedef pair<ll, int> pli;
29 typedef pair<int, ll> pil;
30 
31 const int INF = 0x3f3f3f3f;
32 const double eps = 1E-6;
33 const int LEN = 1001;
34 int n;
35 char op[LEN];
36 queue<int> q;
37 stack<int> s;
38 
39 void solvea(){
40     int num;
41     scanf("%s", op);
42     if(!strcmp(op, "IN")){
43         scanf("%d\n", &num);
44         q.push(num);
45     }else {
46         if(q.empty()) puts("None");
47         else {
48             printf("%d\n", q.front());
49                q.pop();        
50         }
51     }
52 }
53 
54 void solveb(){
55     int num;
56     scanf("%s", op);
57     if(!strcmp(op, "IN")){
58         scanf("%d\n", &num);
59         s.push(num);
60     }else{
61         if(s.empty()){
62             puts("None");
63         }else {
64             printf("%d\n", s.top());
65                s.pop();    
66         }
67     }
68 }
69 
70 int main()
71 {
72 //    freopen("in.txt", "r", stdin);
73 
74     int T;
75     char con[LEN];
76     scanf("%d", &T);
77     while(T--){
78         while(!s.empty()) s.pop();
79         while(!q.empty()) q.pop();
80         scanf("%d%s", &n, con);
81         for(int i=0; i<n; i++){
82             if(!strcmp(con, "FIFO")) solvea();
83             else solveb();     
84         }
85     }
86     return 0;
87 }
代码

B：HDU 1022（易）

 1 /**************************************************
 2  * Author     : xiaohao Z
 3  * Blog     : http://www.cnblogs.com/shu-xiaohao/
 4  * Last modified : 2014-07-03 09:53
 5  * Filename     : hdu_1022.cpp
 6  * Description     : 
 7  * ************************************************/
 8 #include <iostream>
 9 #include <cstdio>
10 #include <cstring>
11 #include <cstdlib>
12 #include <cmath>
13 #include <algorithm>
14 #include <queue>
15 #include <stack>
16 #include <vector>
17 #include <set>
18 #include <map>
19 #define MP(a, b) make_pair(a, b)
20 #define PB(a) push_back(a)
21 
22 using namespace std;
23 typedef long long ll;
24 typedef pair<int, int> pii;
25 typedef pair<unsigned int,unsigned int> puu;
26 typedef pair<int, double> pid;
27 typedef pair<ll, int> pli;
28 typedef pair<int, ll> pil;
29 
30 const int INF = 0x3f3f3f3f;
31 const double eps = 1E-6;
32 const int LEN = 100010;
33 
34 int I(char c){return c-'0';}
35 
36 int main()
37 {
38 //    freopen("in.txt", "r", stdin);
39 
40     stack<int> s;
41     queue<int> q;
42     char in[11], out[11];
43     int ta, tb, n;
44     while(scanf("%d", &n)!=EOF){
45         while(!s.empty()) s.pop();
46         while(!q.empty()) q.pop();
47         scanf("%s%s", &in, &out);
48         ta = tb = 0;
49         int ans = 1;
50         while(1){
51             if(s.empty()) {
52                 s.push(I(in[ta++]));     
53                 q.push(0);
54             }else if(s.top() == I(out[tb])){
55                 tb ++; s.pop();
56                 q.push(1);
57                 if(tb == n) break;
58             }else {
59                 if(ta == n) {
60                     ans = 0;
61                     break;
62                 }else{
63                     q.push(0);
64                     s.push(I(in[ta++]));
65                 }
66             }
67         }
68         if(!ans) puts("No.");
69         else{
70             puts("Yes.");
71             while(!q.empty()){
72                 if(q.front() == 0) puts("in");
73                 else puts("out");
74                 q.pop();
75             }
76         }
77         puts("FINISH");
78     }
79     return 0;
80 }
代码

C: HDU 1387（中等）

 1 /**************************************************
 2  * Author     : xiaohao Z
 3  * Blog     : http://www.cnblogs.com/shu-xiaohao/
 4  * Last modified : 2014-07-03 10:15
 5  * Filename     : hdu_1387.cpp
 6  * Description     : 
 7  * ************************************************/
 8 
 9 #include <iostream>
10 #include <cstdio>
11 #include <cstring>
12 #include <cstdlib>
13 #include <cmath>
14 #include <algorithm>
15 #include <queue>
16 #include <stack>
17 #include <vector>
18 #include <set>
19 #include <map>
20 #define MP(a, b) make_pair(a, b)
21 #define PB(a) push_back(a)
22 
23 using namespace std;
24 typedef long long ll;
25 typedef pair<int, int> pii;
26 typedef pair<unsigned int,unsigned int> puu;
27 typedef pair<int, double> pid;
28 typedef pair<ll, int> pli;
29 typedef pair<int, ll> pil;
30 
31 const int INF = 0x3f3f3f3f;
32 const double eps = 1E-6;
33 const int LEN = 1010;
34 int n, kase = 1;
35 map<int, int> mp;
36 queue<int> qa, q[LEN];
37 
38 void init(){
39     for(int i=0; i<LEN; i++) 
40         while(!q[i].empty()) q[i].pop();
41     mp.clear();while(!qa.empty())qa.pop();
42     printf("Scenario #%d\n", kase ++);
43 }
44 
45 int main()
46 {
47 //    freopen("in.txt", "r", stdin);
48 
49     int num, tn;
50     char op[LEN];
51     while(scanf("%d", &n)!=EOF && n){
52         init();
53         for(int i=0; i<n; i++){
54             scanf("%d", &tn);
55             for(int j=0; j<tn; j++){
56                 scanf("%d", &num);
57                 mp[num] = i;
58             }
59         }
60         while(scanf("%s", op)){
61             if(!strcmp(op, "STOP")) break;
62             else if(!strcmp(op, "ENQUEUE")) {
63                 scanf("%d", &num);
64                 int pos = mp[num];
65                 if(q[pos].empty()) qa.push(pos);
66                 q[pos].push(num);
67             }else if(!strcmp(op, "DEQUEUE")){
68                 int pos = qa.front();
69                 if(q[pos].empty()) qa.pop();
70                 pos = qa.front();
71                 printf("%d\n", q[pos].front());
72                 q[pos].pop();
73             }
74         }
75         puts("");
76     }
77     return 0;
78 }
代码

 E:HDU 1873（易）

 1 /**************************************************
 2  * Author     : xiaohao Z
 3  * Blog     : http://www.cnblogs.com/shu-xiaohao/
 4  * Last modified : 2014-07-03 12:36
 5  * Filename     : hdu_1873.cpp
 6  * Description     : 
 7  * ************************************************/
 8 
 9 #include <iostream>
10 #include <cstdio>
11 #include <cstring>
12 #include <cstdlib>
13 #include <cmath>
14 #include <algorithm>
15 #include <queue>
16 #include <stack>
17 #include <vector>
18 #include <set>
19 #include <map>
20 #define MP(a, b) make_pair(a, b)
21 #define PB(a) push_back(a)
22 
23 using namespace std;
24 typedef long long ll;
25 typedef pair<int, int> pii;
26 typedef pair<unsigned int,unsigned int> puu;
27 typedef pair<int, double> pid;
28 typedef pair<ll, int> pli;
29 typedef pair<int, ll> pil;
30 
31 const int INF = 0x3f3f3f3f;
32 const double eps = 1E-6;
33 const int LEN = 11;
34 queue<int> q[LEN][LEN];
35 int n;
36 
37 int main()
38 {
39 //    freopen("in.txt", "r", stdin);
40 
41     char str[LEN];
42     int a, b;
43     while(scanf("%d", &n)!=EOF){
44         for(int i=0; i<LEN; i++) 
45             for(int j=0; j<LEN; j++)
46                 while(!q[i][j].empty()) q[i][j].pop();
47         int top = 0;
48         for(int i=0; i<n; i++){
49             scanf("%s", str);
50             if(!strcmp(str, "IN")){
51                 scanf("%d%d", &a, &b);
52                 q[a][b].push(++top);
53             }else{
54                 scanf("%d", &a);
55                 int ans = 0;
56                 for(int j=LEN-1; j>0; j--){
57                     if(q[a][j].empty()) continue;
58                     ans = 1;
59                     printf("%d\n", q[a][j].front());
60                     q[a][j].pop();
61                     break;
62                 }
63                 if(!ans) puts("EMPTY");
64             }
65         }
66     }
67     return 0;
68 }
代码

 F:HDU1509（中等）

 1 /**************************************************
 2  * Author     : xiaohao Z
 3  * Blog     : http://www.cnblogs.com/shu-xiaohao/
 4  * Last modified : 2014-07-03 17:46
 5  * Filename     : hdu_1059.cpp
 6  * Description     : 
 7  * ************************************************/
 8 
 9 #include <iostream>
10 #include <cstdio>
11 #include <cstring>
12 #include <cstdlib>
13 #include <cmath>
14 #include <algorithm>
15 #include <queue>
16 #include <stack>
17 #include <vector>
18 #include <set>
19 #include <map>
20 #define MP(a, b) make_pair(a, b)
21 #define PB(a) push_back(a)
22 
23 using namespace std;
24 typedef long long ll;
25 typedef pair<int, int> pii;
26 typedef pair<unsigned int,unsigned int> puu;
27 typedef pair<int, double> pid;
28 typedef pair<ll, int> pli;
29 typedef pair<int, ll> pil;
30 
31 const int INF = 0x3f3f3f3f;
32 const double eps = 1E-6;
33 const int LEN = 1010;
34 
35 struct Mes{
36     char s[51];
37     int m, p, tag;
38 };
39 
40 struct cmp{
41     bool operator() (Mes a, Mes b){
42         if(a.p == b.p) return a.tag > b.tag;
43         else return a.p > b.p;
44     }
45 };
46 
47 int main()
48 {
49 //    freopen("in.txt", "r", stdin);
50 
51     priority_queue<Mes, vector<Mes>, cmp> q;
52     char str[LEN];
53     int top = 1;
54     while(!q.empty()) q.pop();
55     while(scanf("%s", str)!=EOF){
56         if(!strcmp(str, "PUT")){
57             Mes tp;
58             scanf("%s%d%d", tp.s, &tp.m, &tp.p);
59             tp.tag = top++;
60             q.push(tp);
61         }else{
62             if(q.empty()) puts("EMPTY QUEUE!");
63             else {
64                 printf("%s %d\n", q.top().s, q.top().m);
65                 q.pop();
66             }
67         }
68     }
69     return 0;
70 }
代码

 G:HDU 1870（易）

 1 /**************************************************
 2  * Author     : xiaohao Z
 3  * Blog     : http://www.cnblogs.com/shu-xiaohao/
 4  * Last modified : 2014-07-03 18:34
 5  * Filename     : hdu_1870.cpp
 6  * Description     : 
 7  * ************************************************/
 8 
 9 #include <iostream>
10 #include <cstdio>
11 #include <cstring>
12 #include <cstdlib>
13 #include <cmath>
14 #include <algorithm>
15 #include <queue>
16 #include <stack>
17 #include <vector>
18 #include <set>
19 #include <map>
20 #define MP(a, b) make_pair(a, b)
21 #define PB(a) push_back(a)
22 
23 using namespace std;
24 typedef long long ll;
25 typedef pair<int, int> pii;
26 typedef pair<unsigned int,unsigned int> puu;
27 typedef pair<int, double> pid;
28 typedef pair<ll, int> pli;
29 typedef pair<int, ll> pil;
30 
31 const int INF = 0x3f3f3f3f;
32 const double eps = 1E-6;
33 const int LEN = 100010;
34 char str[LEN];
35 
36 int main()
37 {
38 //    freopen("in.txt", "r", stdin);
39 
40     while(scanf("%s", &str)!=EOF){
41         int len = strlen(str);
42         int ans = 0;
43         for(int i=0; i<len; i++){
44             if(str[i] == '(') ans++;
45             else if(str[i] == ')') ans--;
46             else break;
47         }
48         printf("%d\n", ans);
49     }
50     return 0;
51 }
代码

 I:POJ 3253 （中等）

 1 /**************************************************
 2  * Author     : xiaohao Z
 3  * Blog     : http://www.cnblogs.com/shu-xiaohao/
 4  * Last modified : 2014-07-13 11:43
 5  * Filename     : poj_3253.cpp
 6  * Description     : 
 7  * ************************************************/
 8 
 9 #include <iostream>
10 #include <cstdio>
11 #include <cstring>
12 #include <cstdlib>
13 #include <cmath>
14 #include <algorithm>
15 #include <queue>
16 #include <stack>
17 #include <vector>
18 #include <set>
19 #include <map>
20 #define MP(a, b) make_pair(a, b)
21 #define PB(a) push_back(a)
22 
23 using namespace std;
24 typedef long long ll;
25 typedef pair<int, int> pii;
26 typedef pair<unsigned int,unsigned int> puu;
27 typedef pair<int, double> pid;
28 typedef pair<ll, int> pli;
29 typedef pair<int, ll> pil;
30 
31 const int INF = 0x3f3f3f3f;
32 const double eps = 1E-6;
33 priority_queue<int, vector<int>, greater<int> > q;
34 int n;
35 
36 int main()
37 {
38 //    freopen("in.txt", "r", stdin);
39 
40     while(cin >> n){
41         while(!q.empty()) q.pop();
42         for(int i=0; i<n; i++){
43             int num;
44             cin >> num;
45             q.push(num);
46         }
47         ll ans = 0;
48         while(q.size() > 1){
49             int a = q.top(); q.pop();
50             int b = q.top(); q.pop();
51             ans += (a + b);
52             q.push(a + b);
53         }
54         cout << ans << endl;
55     }
56     return 0;
57 }
View Code

 J:POJ 2312 （较难）

 1 /**************************************************
 2  * Author     : xiaohao Z
 3  * Blog     : http://www.cnblogs.com/shu-xiaohao/
 4  * Last modified : 2014-07-13 10:22
 5  * Filename     : poj_2312.cpp
 6  * Description     : 
 7  * ************************************************/
 8 
 9 #include <iostream>
10 #include <cstdio>
11 #include <cstring>
12 #include <cstdlib>
13 #include <cmath>
14 #include <algorithm>
15 #include <queue>
16 #include <stack>
17 #include <vector>
18 #include <set>
19 #include <map>
20 #define MP(a, b) make_pair(a, b)
21 #define PB(a) push_back(a)
22 
23 using namespace std;
24 typedef long long ll;
25 typedef pair<int, int> pii;
26 typedef pair<unsigned int,unsigned int> puu;
27 typedef pair<int, double> pid;
28 typedef pair<ll, int> pli;
29 typedef pair<int, ll> pil;
30 
31 const int INF = 0x3f3f3f3f;
32 const double eps = 1E-6;
33 const int LEN = 310;
34 char Map[LEN][LEN];
35 int m, n, vis[LEN][LEN], sx, sy;
36 int xx[] = {0, 0, 1,-1};
37 int yy[] = {1,-1, 0, 0};
38 struct P{
39     int x, y, st;
40 };
41 
42 struct cmp{
43     bool operator() (P a, P b){
44         return a.st > b.st;
45     }
46 };
47 
48 P mpp(int _x, int _y, int _st){
49     P ret;
50     ret.x = _x;ret.y = _y;ret.st = _st;
51     return ret;
52 }
53 
54 bool J(int x, int y){
55     return x >= 0 && x < n && y >= 0 && y < m && Map[x][y] != 'S' && Map[x][y] != 'R';
56 }
57 
58 int bfs(){
59     priority_queue<P, vector<P>, cmp> q;
60     memset(vis, 0, sizeof vis);
61     vis[sx][sy] = 1;
62     q.push(mpp(sx, sy, 0));
63     while(!q.empty()){
64         P nvex = q.top(); q.pop();
65         int x = nvex.x, y = nvex.y, st = nvex.st;
66         if(Map[x][y] == 'T') return st;
67         for(int i=0; i<4; i++){
68             int tx = x + xx[i];
69             int ty = y + yy[i];
70             int nst = st + 1;
71             if(J(tx, ty) && !vis[tx][ty]){
72                 if(Map[tx][ty] == 'B') nst ++;
73                 vis[tx][ty] = 1;
74                 q.push(mpp(tx, ty, nst));
75             }
76         }
77     }
78     return -1;
79 }
80 
81 int main()
82 {
83 //    freopen("in.txt", "r", stdin);
84 
85     while(cin >> n >> m){
86         if(!n && !m) break;
87         for(int i=0; i<n; i++){
88             for(int j=0; j<m; j++){
89                 cin >> Map[i][j];
90                 if(Map[i][j] == 'Y'){
91                     sx = i; sy = j;
92                 }
93             }
94         }
95         int ans = bfs();
96         cout << ans << endl;
97     }
98     return 0;
99 }
View Code

 

posted @ 2014-07-03 09:53  张小豪  阅读(184)  评论(0)  编辑  收藏  举报