Problem 1002 数据范围比较奇怪?

TsReaper | 2015-09-26 19:20:12Author
1≤x1≤x2≤n,1≤y1≤y2≤m. 但是样例中有:2 2 2 1,显然y1>y2,到底哪个是正确的?
TsReaper | 2015-09-26 19:20:46# 1
sorry看错行了:(