#include <stdio.h>

char buf[2000000];

int main(void) {
    char *p = buf;
    long long sum = 0L;

    size_t s = fread(buf, sizeof(char), 2000000, stdin);
    buf[s - 1] = ' ';

    while (*p++ != '\n');
    while (*p) {
        long long a = 0L;
        while (*p != ' ') {
            a = a * 10L + (long long)(*p++ - '0');
        }
        p++;
        sum += a;
    }
        
    printf("%lld\n", sum);
    
    return 0;
}