#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main() {
	char c, *ptr, str[256], n[16];
	int i = 0, j = 0, len;
	long sum = 0;
	
	while ((c = getchar()) != EOF) {
		str[i] = c;
		i++;
	}
	str[i] = '\0';
	len = strlen(str);
	for (i = 0; i <= len; i++) {
		n[j] = str[i];
		j++;
		if ((str[i] == 32) || (str[i] == '\n')) {
			n[j] = '\0';
			if ((n[0] == '\0') || (n[0] < 48) || (n[0] > 57)) {
				char n[2] = {'0', '\0'};
			}
			sum = sum + strtol(n, &ptr, 10);
			j = 0;
		}
	}
	printf("\n%ld\n", sum);
}