[백준 14732번] 행사장 대여 (Small)

소스코드

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#include <iostream>
using namespace std;
 
int main() {
    int n,map[501][501],ret=0;
    cin >> n;
    for (int i = 0; i <= 500; i++)
        for (int j = 0; j <= 500; j++)
            map[i][j] = 0;
    for (int i = 0; i < n; i++) {
        int x1, y1, x2, y2;
        cin >> x1 >> y1 >> x2 >> y2;
        for (int x = x1; x < x2; x++) {
            for (int y = y1; y < y2; y++) {
                if (map[x][y] == 0) { ret++; map[x][y] = 1; }
            }
        }
    }
    cout << ret << '\n';
    return 0;
}