#include <stdio.h>

char buf[2000000];


int main(void) {
    char *p = buf;
    int n = 0, i;
    long long sum = 0LL;
    unsigned int f1 = 0, f2 = 1, fb = 0;
    
    fread(buf, sizeof(char), 2000000, stdin);
    
    if (*p < '1' || '9' < *p) {
        perror("invalid n");
        return 1;
    }
    while ('0' <= *p && *p <= '9') {
        n = 10 * n + (int)(*p - '0');
        p++;
    }
    if (*p != '\n') {
        perror("invalid first newline");
        return 1;
    }
    p++;
    for (i = 0; i < n; i++) {
        long long a = 0LL;
        if (*p < '0' || '9' < *p) {
            fprintf(stderr, "invalid digit No.%d", i);
            return 1;
        }
        while ('0' <= *p && *p <= '9') {
            a = 10LL * a + (long long)(*p - '0');
            p++;
        }
        sum += a;
        if (*p != '\n') {
            perror("invalid newline");
            return 1;
        }
        *p++;
    }
    if (*p != '\0') {
        perror("invalid input");
        return 1;
    }
    
    printf("%lld\n", sum);
    
    return 0;
}