#include <stdio.h>
int main(int argc, const char *argv[])
{
    int num = 0,sum = 0;
    char ch;
    while((ch = getchar()) != ‘\n‘)
    {
        if(ch != ‘ ‘)
        {
            num = num*10+ch-‘0‘;
        }
        if(ch == ‘ ‘)
        {
            sum = sum +num;
            num = 0;
        }
    }
    printf("%d\n",sum+num);
    return 0;
}