/in/foo.cc: In function 'int dfs(int, int)':
/in/foo.cc:35:20: warning: suggest parentheses around comparison in operand of '|' [-Wparentheses]
         if(tx>n||tx<1|ty>m||ty<1||a[tx][ty]<=a[x][y]) continue;
                  ~~^~
/in/foo.cc: In function 'int youngsc()':
/in/foo.cc:53:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^