/in/foo.cc: In function 'int main()':
/in/foo.cc:15:39: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'long long int*' [-Wformat=]
  for(int i=1;i<=n;++i)scanf("%d",&a[i]);
                                       ^
/in/foo.cc:28:24: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
     printf("%d",f[1][m]);
                        ^