init commit

3sem/cnts/contest14/02.c

@@ -0,0 +1,51 @@
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <stdlib.h>
+#include <signal.h>
+
+volatile int mode = 0; // 0 - +    1 - *
+
+void
+mul(int n)
+{
+    mode = 1;
+
+    return;
+}
+
+void
+sum(int n)
+{
+    mode = 0;
+
+    return;
+}
+
+int
+main(int argc, char *argv[])
+{
+    sigaction(SIGINT, &(struct sigaction){.sa_handler = sum, .sa_flags = SA_RESTART}, NULL);
+    sigaction(SIGQUIT, &(struct sigaction){.sa_handler = mul, .sa_flags = SA_RESTART}, NULL);
+
+    printf("%d\n", getpid());
+    fflush(stdout);
+
+    int res = 0, tmp;
+
+    while (scanf("%d", &tmp) == 1) {
+        if (mode == 0) {
+            __builtin_add_overflow(res, tmp, &res);
+        } else {
+            __builtin_mul_overflow(res, tmp, &res);
+        }
+        printf("%d\n", res);
+        fflush(stdout);
+    }
+
+    // for (;;) {
+    //     pause();
+    // }
+
+    return 0;
+}