#include<stdio.h>
int main()
{
     int n,i,j,c,t,T;
    scanf("%d",&T);
    while(T--)
    {
    scanf("%d",&n);
    for(j=2;;j++)
    {
        c=0;
        t=0;
        for(i=2;i<=j/2;i++)
        {
            if(j%i==0)
            {
                c++;
                break;
            }
        }
        if(c==0)
            t++;
        if(t==n)
           {
               printf("%d\n",j);
               break;
            }

    }
  }
  return 0;
}
why TLE??
Edited by author 04.02.2017 11:04

Edited by author 04.02.2017 11:05

Edited by author 04.02.2017 11:08

Error here: t=0. You wanted this:
#include<stdio.h>
int main()
{
    int n,i,j,c,t,T;
    scanf("%d",&T);
    while(T--)
    {
    scanf("%d",&n);
    t=0;
    for(j=2;;j++)
    {
        c=0;
        for(i=2;i<=j/2;i++)
        {
            if(j%i==0)
            {
                c++;
                break;
            }
        }
        if(c==0)
            t++;
        if(t==n)
           {
               printf("%d\n",j);
               break;
            }

    }
  }
  return 0;
}

But your algo will get TL on test:
15000
15000
....
15000
(15001 times)