/in/foo.cc: In function 'int main()':
/in/foo.cc:17:13: warning: 'maxj' may be used uninitialized in this function [-Wmaybe-uninitialized]
    int maxi,maxj;
             ^
/in/foo.cc:27:31: warning: 'maxi' may be used uninitialized in this function [-Wmaybe-uninitialized]
     if(a[q][maxj]<a[maxi][maxj]){
                               ^