SPOJ - Przekroczenie limitu czasu

#include <iostream>
using namespace std;

bool f_EndRound(int a, int b){
    return (a == 0 || b == 0 || a == b);
}
int f_StartRound(int a, int b){
    while(!f_EndRound(a, b))
    {
        if(a > b)
         a -= b;
        else
        if(b > a)
         b -= a;
    }
    return a+b;
}
int main()
{
    int t;
    for(cin>>t; t>0; --t)
    {
        int a, b;
        cin >> a >> b;
        cout << f_StartRound(a, b) << endl;
    }
    return 0;
}

#include <iostream>
using namespace std;

int f_StartRound(int a, int b){
    while(a != 0 && b != 0 && a != b)
    {
        if(a > b)
         a -= b;
        else
        if(b > a)
         b -= a;
    }
    return a+b;
}
int main()
{
    int t;
    for(cin>>t; t>0; --t)
    {
        int a, b;
        cin >> a >> b;
        cout << f_StartRound(a, b) << endl;
    }
    return 0;
}
 

#include <cstdio>
using namespace std;

unsigned nwd(unsigned a,unsigned b)
  {
   while(b)
     {
      unsigned r=a%b;
      a=b;
      b=r;
     } 
   return a; 
  }

int main()
  {
   unsigned T,A,B;
   for(scanf("%u",&T);T--;printf("%u\n",nwd(A,B)<<1)) scanf("%u%u",&A,&B);
   return 0;
  }

int f_StartRound(int a, int b){
    if((a == 1 && b > 1) || (a > 1 && b == 1))
     return 2;