OJ Board

could any one know why my code verdicts RE: while its optimized for fast execution: ??!!!

#include<iterator>
#include<iostream>
#include<vector>
using namespace std;
struct dim{int x,y;}obj;
int Field_counter=1;
vector<dim> Mines;
int main()
{
int r=-1,c=-1;
while(r!=0&&c!=0 && scanf("%i %i",&r ...