#include <stdio.h>
#include <stdlib.h>
struct range {
	int z;
	int k;
};
struct range gen_range () {
	
}
int main (void) {
	char * buf = malloc(300000);
	fgets(buf, 255, stdin);
	fgets(buf, 300000, stdin);
	char * c = buf;
	int len = 0;
	int * a = malloc(10000*sizeof *a);
	while (c) {
		a[len++] = strtol(c, &c, 10);
		c++;
	}
	unsigned long long int sum;
	int z = 0;
	int k = 0;
	int sqrt
	work 
	if (z == lkl) {

	}
	printf("%llu\n", sum);
}