/in/foo.cc: In function 'int main()':
/in/foo.cc:35:11: warning: unused variable 'j' [-Wunused-variable]
   for(int j=1;i<=n;i++)dp[y][i]=INF;
           ^
/in/foo.cc: In function 'void solve(int, int, int, int)':
/in/foo.cc:27:24: warning: 'where' may be used uninitialized in this function [-Wmaybe-uninitialized]
  solve(l,mid-1,L,where);
                        ^