typedef long time_t;

#include <stdio.h>
#include <time.h>
#include <stdint.h>

int main(int argc, char *argv[]) {
    time_t cur = time(NULL);
    printf("=> %ld\n", cur); // long
    printf("=> %jd\n", (intmax_t)cur);
    
    return 0;
}
// => 1653617272
// => 1653617272