宣传一下$\Huge\color{green}{春季每日一题题解}$

校门外的树是什么？

here

肥肠煎蛋，就直接标志数组即可。
这题其实也一样，只是二维了一下。

#include <bits/stdc++.h>
using namespace std;
int g[2010][2010];
int main() {
    int a, b, c, d;
    for (int p = 0; p < 2; p++) {
        scanf("%d%d%d%d", &a, &b, &c, &d);
        a += 1000; b += 1000; c += 1000; d += 1000;
        for (int i = a; i < c; i++)
            for (int j = b; j < d; j++) g[i][j] = 1;
    }
    scanf("%d%d%d%d", &a, &b, &c, &d);
    a += 1000; b += 1000; c += 1000; d += 1000;
    for (int i = a; i < c; i++)
        for (int j = b; j < d; j++) g[i][j] = 0;
    int ans = 0;
    for (int i = 0; i <= 2000; i++)
        for (int j = 0; j <= 2000; j++) ans += g[i][j];
    printf("%d\n", ans);
    return 0;
}