【題解】ZeroJudge d914: 2. 圍棋資料庫比對

#include <iostream>
using namespace std;

int n, a, b, c, g[20][20], ans;

int main() {
    cin >> n;
    for (int i = 0; i < n; i++){
        cin >> a >> b >> c;
        if (c) g[a][b]++;
        else g[a][b]--;
    }
    cin >> n;
    for (int i = 0; i < n; i++){
        cin >> a >> b >> c;
        if (c) g[a][b]--;
        else g[a][b]++;
    }
    for (int i = 1; i <= 19; i++){
        for (int j = 1; j <= 19; j++){
            ans += abs(g[i][j]);
        }
    }
    cout << ans << "\n";
}