HDU 2955 Robberies(DP)

题目网址：http://acm.hdu.edu.cn/showproblem.php?pid=2955

#include <iostream>
#include <algorithm>
#include <cstring>
using namespace std;

int v[100+5];
double dp[105*105];
double p[100+5];

int main(){
    int T, m, sum;
    double pe;
    cin>>T;
    while(T--){
        sum = 0;
        cin>>pe>>m;
        for(int i = 0;i < m; i++){
            cin>>v[i]>>p[i];
            sum += v[i];
        }
        for(int i=1;i<= sum;i++)
            dp[i] = 0;
        dp[0] = 1;
        for(int i = 0;i < m; i++){
            for(int j=sum;j >= v[i]; j--){
                dp[j] = max(dp[j], dp[j-v[i]]*(1-p[i]));
            }
        }
        for(int j = sum;j >= 0; j--){
            if(dp[j] > (1-pe)){
                cout<<j<<endl;
                break;
            }
        }
    }
    return 0;
}