/in/foo.cc: In function 'int main()':
/in/foo.cc:36:4: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
    if(tmp2.x < 0 || tmp2.y < 0 || tmp2.x >= n || tmp2.y >= m || vis[tmp2.x][tmp2.y])
    ^~
/in/foo.cc:39:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
     vis[tmp2.x][tmp2.y] = 1;
     ^~~