View Code of Problem 31

#include<stdio.h>

int main(){
	long int n,num;
	
	while(scanf("%ld",&n)!=EOF){
		if(n<1){
			break;
		}	else{
			num=23+3*5*7*(n-1);
			printf("%ld\n",num);
		}
	

		
	}
	
	return 0;
}