/in/foo.cc: In function 'int main()':
/in/foo.cc:29:25: warning: format '%lld' expects argument of type 'long long int*', but argument 2 has type 'int*' [-Wformat=]
   scanf("%lld",&c[i].val);
                         ^
/in/foo.cc:82:24: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
   printf("%d\n",C[x][y]);
                        ^