握手问题 参考代码

#include <bits/stdc++.h>
using namespace std;

typedef long long LL;
const int maxn = 100;

int main() {
#ifdef ExRoc
    freopen("test.txt", "r", stdin);
#endif // ExRoc
    ios::sync_with_stdio(false);

    cout << 43 * 42 / 2 + 43 * 7 << endl;

    return 0;
}