UVA - 10499 The Land of Justice

#include<cstdio>

int main() {
	
	long long number;
	while(scanf("%lld", &number)) {
		if(number < 0)
			break;
		if(number <= 1)
			printf("0%%\n");
		else
			printf("%lld%%\n", 25 * number);	
	}
	return 0;
}