/in/foo.cc: In function 'int main()':
/in/foo.cc:47:9: warning: unused variable 'h' [-Wunused-variable]
  int T, h, r, p[maxn][3] = {0};
         ^
/in/foo.cc:47:12: warning: unused variable 'r' [-Wunused-variable]
  int T, h, r, p[maxn][3] = {0};
            ^
/in/foo.cc:47:15: warning: unused variable 'p' [-Wunused-variable]
  int T, h, r, p[maxn][3] = {0};
               ^