What's wrong?
Please, answer me.

#include <iostream>
#include <vector>
using namespace std;

int main() {
    bool z;
    vector <int> so(0), st(0);
    unsigned int a;
    cin >> a;
    while (so.size() < a) {
        int soe;
        cin >> soe;
        so.push_back(soe);
    }
    unsigned int b;
    cin >> b;
    while (st.size() < b) {
        int ste;
        cin >> ste;
        st.push_back(ste);
    }

    for (unsigned int i = 0; i < so.size(); i++)
        for (unsigned int j = 0; j < st.size(); j++) {
            if (so[i] + st[j] == 10000) {
                z = true;
            }
        }
    if (z == true) {
        cout << "YES" << endl;
    }
    else {
        cout << "NO" << endl;
    }

}

Edited by author 24.10.2015 04:23