POJ-2533 Longest Ordered Subsequence LIS
题目链接:http://poj.org/problem?id=2533
基本DP:f[i]=max{f[j]}+1。
1 //STATUS:C++_AC_32MS_184KB 2 #include<stdio.h> 3 #include<stdlib.h> 4 #include<string.h> 5 #include<math.h> 6 #include<iostream> 7 #include<string> 8 #include<algorithm> 9 #include<vector> 10 #include<queue> 11 #include<stack> 12 using namespace std; 13 #define LL __int64 14 #define pii pair<int,int> 15 #define Max(a,b) ((a)>(b)?(a):(b)) 16 #define Min(a,b) ((a)<(b)?(a):(b)) 17 #define mem(a,b) memset(a,b,sizeof(a)) 18 #define lson l,mid,rt<<1 19 #define rson mid+1,r,rt<<1|1 20 const int N=1010,INF=0x3f3f3f3f,MOD=1999997; 21 const LL LLNF=0x3f3f3f3f3f3f3f3fLL; 22 23 int num[N],w[N],f[N]; 24 int n; 25 26 int main() 27 { 28 // freopen("in.txt","r",stdin); 29 int i,j,ans; 30 while(~scanf("%d",&n)) 31 { 32 ans=f[0]=1; 33 for(i=0;i<n;i++) 34 scanf("%d",&num[i]); 35 for(i=1;i<n;i++){ 36 f[i]=1; 37 for(j=0;j<i;j++) 38 if(num[j]<num[i]) 39 f[i]=Max(f[i],f[j]+1); 40 if(f[i]>ans)ans=f[i]; 41 } 42 43 printf("%d\n",ans); 44 } 45 return 0; 46 }