HDOJ-2110 Crisis of HDU

#include <iostream>
#include <cstdio>
#include <algorithm>
#include <cstring>
#include <vector>
#include <climits>
#include <set>

using namespace std;
#define maxn 100

int p[maxn], m[maxn], c1[maxn*maxn], c2[maxn*maxn];
int main()
{
// freopen("in.txt", "r", stdin);
    int n;

    while(cin >> n && n)
    {
        for(int i = 0; i < n; i++)
        {
            cin >> p[i] >> m[i];
        }
        memset(c1, 0, sizeof(c1));
        memset(c2, 0, sizeof(c2));

        int s = 0;
        c1[0] = 1;
        c2[0] = 1; 
        for(int i = 0; i < n; i++)
        {
            for(int j = 0; j <= s; j++)
             for(int k = 1; k <= m[i]; k++)
             {
                 int t = j + k * p[i];
                 c2[t] += c1[j];
                 c2[t] %= 10000;
             }
            s += p[i] * m[i];

            for(int i = 0; i <= s; i++)
            {
                c1[i] = c2[i];
            }
        }
        if(s % 3 == 0)
            cout << c1[s/3] << endl;
        else
            cout << "sorry" << endl;
    }
    return 0;
}