河南省第五届ACM程序设计大赛

 

 

D:   遥 控 器

#include<cstdio>
#include<cstring>
#include<iostream>
#include<algorithm>
#include<cmath>
#include<queue>
#include<vector>
#include<map>
using namespace std;
typedef unsigned long long LL;
#define met(a,b) (memset(a,b,sizeof(a)))
const int INF = 1e9+7;
const int N = 11000;
const int MOD = 9973;

int a[20], s, e;

int Slove()
{
    int i, Mintime = 100, shi=e/10, ge=e%10;

    if(s>e)
    {
        if(a[11])
            Mintime = min(Mintime, 100-(s-e));
        if(a[12])
            Mintime = min(Mintime, s-e);
    }
    else if(s<e)
    {
        if(a[11])
            Mintime = min(Mintime, e-s);
        if(a[12])
            Mintime = min(Mintime, 100-(e-s));
    }
    else
        Mintime = 0;

    if(s!=e && !a[11] && !a[12])
    {
        if(shi==0)
        {
            if(!a[ge]) Mintime = -1;
        }
        else
        {
            if(!a[10]) Mintime = -1;
            if(!a[shi]) Mintime = -1;
            if(!a[ge]) Mintime = -1;
        }
    }

    for(i=0; i<=99; i++)
    {
        if(i==s) continue;

        int sh = i/10, g = i%10;
        if(sh==0 && a[g])
        {
            if(i>e)
            {
                if(a[11]) ///变大
                    Mintime = min(Mintime, 100-(i-e)+1);
                if(a[12]) ///变小
                    Mintime = min(Mintime, (i-e)+1);
            }
            else if(i<e)
            {
                if(a[11])
                    Mintime = min(Mintime, (e-i)+1);
                if(a[12])
                    Mintime = min(Mintime, 100-(e-i)+1);
            }
            else Mintime = min(Mintime, 1);
        }
        else if(a[10] && a[sh] && a[g])
        {
            if(i>=e)
            {
                if(a[11])
                    Mintime = min(Mintime, 100-(i-e)+3);
                if(a[12])
                    Mintime = min(Mintime, (i-e)+3);
            }
            else if(i<e)
            {
                if(a[11])
                    Mintime = min(Mintime, (e-i)+3);
                if(a[12])
                    Mintime = min(Mintime, 100-(e-i)+3);
            }
            else Mintime = min(Mintime, 3);
        }
    }

    if(Mintime==100)
        Mintime = -1;
    return Mintime;
}

int main()
{
    int T;
    scanf("%d", &T);
    while(T--)
    {
        met(a, 0);

        scanf("%d%d%d%d", &a[1], &a[2], &a[3], &a[11]);
        scanf("%d%d%d%d", &a[4], &a[5], &a[6], &a[12]);
        scanf("%d%d%d", &a[7], &a[8], &a[9]);
        scanf("%d%d", &a[10], &a[0]);

        scanf("%d%d", &s, &e);

        int ans = Slove();

        printf("%d\n", ans);
    }
    return 0;
}
/**

*/

 

 

G:   Divideing Jewels (01背包)  代码写的有点丑

#include<cstdio>
#include<cstring>
#include<iostream>
#include<algorithm>
#include<cmath>
#include<queue>
#include<vector>
#include<map>
using namespace std;
typedef unsigned long long LL;
#define met(a,b) (memset(a,b,sizeof(a)))
const int INF = 1e9+7;
const int N = 11000;
const int MOD = 9973;
 
int a[20], dp[N], v[N], k;
 
void Slove()  ///重点就在于怎样的把它转化为01背包
{
    int i, j;
    k=1;
 
    for(i=1; i<=10; i++)
    for(j=1; j<=a[i]; j++)
           v[k++] = i;
    k--;
}
 
int main()
{
 
    int iCase=1;
 
    while(scanf("%d%d%d%d%d%d%d%d%d%d", &a[1], &a[2], &a[3], &a[4], &a[5], &a[6], &a[7], &a[8], &a[9], &a[10])!=EOF)
    {
        int sum=0, i, j;
 
        for(i=1; i<=10; i++)
            sum += a[i]*i;
 
        if(sum==0) break;
 
        met(dp, 0);
        met(v, 0);
 
        Slove();
 
        for(i=1; i<=k; i++)
        for(j=sum/2; j>=v[i]; j--)
        {
            if(j>=v[i])
                dp[j] = max(dp[j], dp[j-v[i]]+v[i]);
        }
 
 
        if(sum%2 || dp[sum/2]!=sum/2)
            printf("#%d:Can't be divided.\n\n", iCase++);
        else
            printf("#%d:Can be divided.\n\n", iCase++);
 
    }
 
    return 0;
}