View Code of Problem 31

#include <stdio.h>
int main(){
	long int k,i;
	while(scanf("%d",&k)!=EOF){
		if(k<1)
			break;
		else{
			i = 23 + 3 * 5 * 7*(k - 1);
			printf("%d\n",i);
		}
	}
	return 0;
}