全wrong。。。有大佬能帮我看看吗

#include <bits/stdc++.h>
using namespace std;
int a[1010][4], n, cnt, sum[1010], c;

int main() {
	cin >> n;

	for (int i = 1; i <= n; i++) {

		for (int j = 1; j <= 3; j++) {

			cin >> a[i][j];

		}
	}

	for (int i = 1; i <= n; i++) {

		for (int j = 1; j <= 3; j++) {

			sum[i] += a[i][j];
		}
	}

	for (int i = 2; i <= n; i++) {

		c = 0;

		for (int j = 1; j <= 3; j++) {

			if (abs(a[i][j] - a[i - 1][j]) <= 5) {
				c++;
			}


		}

		if (c == 3 && abs(sum[i] - sum[i - 1]) <= 10) {
			cnt++;
		}
	}

	cout << cnt;
	return 0;
}