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
 1 #include <iostream>
 2 #include <vector>
 3 #include <algorithm>
 4 #include <cstdio>
 5 #include <cmath>
 6 
 7 using namespace std;
 8 
 9 int main(){
10     int n;
11     while(cin >> n && n >= 0){
12         int v,num,sumV = 0;
13         vector<int> value;
14         for(int i =0; i < n; i ++){
15             cin >>v>>num;
16             sumV += v*num;
17             int tmp =1;
18             while(num > tmp){
19                 value.push_back(tmp*v);
20                 num -=tmp;
21                 tmp <<=1;
22             }
23             value.push_back(num*v);
24             /*
25             if(num > 1){
26                 int temp = 0, k=0;
27                 while(1){
28                     int a = pow(2,k++);
29                     if(temp + a > num ) break;
30                     temp += a;
31                     value.push_back(a*v);
32                 }
33                 value.push_back((num-temp)*v);
34             }
35             else{
36                 value.push_back(v);
37             }*/
38         }
39         vector<int> dp(sumV/2+1,0);
40         for(int i = 0; i < value.size(); i ++ ){
41             for(int j = sumV/2; j >= value[i]; j -- ){
42                 dp[j] = max(dp[j],dp[j-value[i]]+value[i]);
43             }
44         }
45         cout<< sumV-dp[sumV/2] << " "<<dp[sumV/2]<<endl;
46     }
47     return 0;
48 }