有没有可能，你n和m写反了
by Helioca @ 2024-02-01 22:14:31
"if(i==0 || j==0 || i==n-1 || j==m-1) sum+=a[i][j];"这一行
by Helioca @ 2024-02-01 22:14:57
@[Helioca](/user/685990) 多谢多谢，AC了
by Hanlone556 @ 2024-02-02 10:07:49