#include <stdio.h>
 
int main() {
    int num, count = 0;
    int a, b, c;
    do {
        printf("Enter a 3-digit number: ");
        scanf("%d", &num);
        a = num / 100;
        b = (num / 10) % 10;
        c = num % 10;
        if (num >= 100 && num <= 999 && a != b && b != c && a != c) {
            count++;
        } else {
            printf("Invalid! Stopping...\n");
            break;
        }
    } while (1);
    printf("Count of valid numbers = %d\n", count);
    return 0;
}

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