#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <errno.h>

enum { BASE = 10 };

int main(int argc, char *argv[]) {
    for (int i = 1; i < argc; ++i) {
        errno = 0;
        char* eptr;
        int64_t n = strtol(argv[i], &eptr, BASE);
        if (*eptr || errno) {
            printf("-1\n");
        } else {
            int8_t n8 = n;
            int16_t n16 = n;
            int32_t n32 = n;
            if (n8 == n) {
                printf("1\n");
            } else if (n16 == n) {
                printf("2\n");
            } else if (n32 == n) {
                printf("4\n");
            }
        }
    }
}