Python代码

import sys

read_line = sys.stdin.readline

n, a, b = map(int, read_line().split())

fields = [list(map(int, read_line().split())) for i in range(n)]

s = 0
for x1,y1,x2,y2 in fields:
    # 这四种情况与原区域没有交集
    if x1 >= a or y1 >= b or x2 <= 0 or y2 <= 0:
        s += 0
    else:
        # 有交集的情况计算重叠面积
        s += (min(x2,a) - max(x1,0)) * (min(y2,b) - max(y1,0))

print(s)