也不知道是怎么回事

#include <cstdio>

using namespace std;

int main() {
    int n, numbers[200001], counter[10001];
    scanf("%d", &n);
    for (int i = 0; i < n; i++) {
        scanf("%d", &numbers[i]);
    }
    for (int i : numbers) {
        counter[i - 1]++;
    }
    for (int i = 0; i < 100001; i++) {
        if (counter[i] != 0) {
            printf("%d %d", i + 1, counter[i]);
        }
    }
    return 0;
}