C语言实现 统计序列中不同值的个数

#include <stdio.h>

int main() {
    int n;
    scanf("%d", &n);
    int nums[n];
    for (int i = 0; i < n; i++) {
        scanf("%d", &nums[i]);
    }
    
    int count = 0;
    for (int i = 0; i < n; i++) {
        int unique = 1;
        for (int j = 0; j < i; j++) {
            if (nums[i] == nums[j]) {
                unique = 0;
                break;
            }
        }
        if (unique) {
            count++;
        }
    }
    
    printf("%d\n", count);
    
    return 0;
}