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

int main(void)
{
    FILE *intrare, *iesire;
    long suma = 0;
    char str[100];
    
    intrare = fopen("adunare.in", "r");
    iesire = fopen("adunare.out", "w");
    
    if(intrare == NULL)return(0);
    
    while(!feof(intrare)) 
    {
        if(fgets(str, 100, intrare))
        {
            suma += atoi(str);
            if(suma > 2000000000)return(0);
        }
    }
    fprintf(iesire,"%d",suma);
    
    fclose(intrare);
    fclose(iesire);
    
    return(0);
}