#include <stdlib.h>
#include <stdio.h>

int main()
{
    int value = 0;
    char *line = NULL;
    size_t line_len = 0;
    FILE *f = fopen("input", "r");
    if (!f) {
        perror("input");
        return 1;
    }

    while (getline(&line, &line_len, f) != -1) {
        long number = strtol(line, NULL, 0);
        value += number;
    }

    printf("%d\n", value);

    free(line);
    fclose(f);
    return 0;
}