/in/foo.cc: In function 'int main()':
/in/foo.cc:13:25: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'long long int*' [-Wformat=]
    scanf("%d",&map[i][j]);
                         ^
/in/foo.cc:38:9: warning: 'p' may be used uninitialized in this function [-Wmaybe-uninitialized]
    lu[p]=1;
    ~~~~~^~