#include <signal.h>
#include <stdio.h>
#include <unistd.h>
#include <inttypes.h>

int f = 0;

void
handler1(int sig)
{
    f = 0;
}

void
handler2(int sig)
{
    f = 1;
}

int
main(void)
{
    struct sigaction sa1, sa2;
    sigemptyset(&sa1.sa_mask);
    sigemptyset(&sa2.sa_mask);
    sa1.sa_flags = SA_RESTART;
    sa2.sa_flags = SA_RESTART;
    sa1.sa_handler = handler1;
    sa2.sa_handler = handler2;
    sigaction(SIGINT, &sa1, NULL);
    sigaction(SIGQUIT, &sa2, NULL);
    printf("%d\n", getpid());
    fflush(stdout);
    uint32_t a, s = 0;
    while (scanf("%" PRId32, &a) == 1) {
        if (!f) {
            s += a;
        } else {
            s *= a;
        }
        printf("%" PRId32 "\n", s);
        fflush(stdout);
    }
    return 0;
}