View Code of Problem 31

#include <stdio.h>
int main(){
	int a,b=0,k=0,i=0;
	scanf("%d",&k);
	if(k <= 0)
		return 0;
	while(++i)
	{	
		a = i*7+2;
		if((a%3==2) && (a%5==3))
			b++;
		if(k == b)
		{
			printf("%d\n",a);
			break;
		}
	}
	
	return 0;
}