#include <stdio.h>
#ifdef __cplusplus
#error This C file must be compiled as C, not C++.
#endif
#if __STDC_VERSION__ < 202311L
#error C23 is required.
#endif
int main(void) {
    long long a, b;
    printf("C23 | GCC %s\nInput two integers: ", __VERSION__);
    fflush(stdout);
    if (scanf("%lld %lld", &a, &b) != 2) return 1;
    printf("SUM = %lld\n", a + b);
    return 0;
}