/in/foo.cc: In function 'int main()':
/in/foo.cc:17:17: warning: statement has no effect [-Wunused-value]
     matrix[i][j]==0;
     ~~~~~~~~~~~~^~~
/in/foo.cc:19:17: warning: statement has no effect [-Wunused-value]
     matrix[i][j]==INT_MAX;}
                 ^