HDU 1171 Big Event in HDU

此题实在无语就因为把判断输入条件写成 n!=-1就WA了几次，自己以后要多注意

#include <iostream>
#include <vector>
#include <algorithm>
#include <cstdio>
#include <cmath>

using namespace std;

int main(){
    int n;
    while(cin >> n && n >= 0){
        int v,num,sumV = 0;
        vector<int> value;
        for(int i =0; i < n; i ++){
            cin >>v>>num;
            sumV += v*num;
            int tmp =1;
            while(num > tmp){
                value.push_back(tmp*v);
                num -=tmp;
                tmp <<=1;
            }
            value.push_back(num*v);
            /*
            if(num > 1){
                int temp = 0, k=0;
                while(1){
                    int a = pow(2,k++);
                    if(temp + a > num ) break;
                    temp += a;
                    value.push_back(a*v);
                }
                value.push_back((num-temp)*v);
            }
            else{
                value.push_back(v);
            }*/
        }
        vector<int> dp(sumV/2+1,0);
        for(int i = 0; i < value.size(); i ++ ){
            for(int j = sumV/2; j >= value[i]; j -- ){
                dp[j] = max(dp[j],dp[j-value[i]]+value[i]);
            }
        }
        cout<< sumV-dp[sumV/2] << " "<<dp[sumV/2]<<endl;
    }
    return 0;
}