/in/foo.cc: In member function 'void Matrix::Read() const':
/in/foo.cc:18:27: warning: writing into constant object (argument 2) [-Wformat=]
     scanf("%d", &Mat[i][j]);
                           ^
/in/foo.cc:18:27: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'const long long int*' [-Wformat=]
/in/foo.cc: In function 'int main()':
/in/foo.cc:69:23: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'long long int*' [-Wformat=]
  scanf("%d %d", &K, &N);
                       ^
/in/foo.cc:69:23: warning: format '%d' expects argument of type 'int*', but argument 3 has type 'long long int*' [-Wformat=]
/in/foo.cc:72:30: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
  printf("%d\n", ans.Mat[1][K]);
                              ^