编译运行和示例是一样的，但是提交之后全是WA，请问大佬们这是为啥？？qwq

#include<iostream>
#define inf 400
using namespace std;
int main()
{
	int ch[inf];
	int i = 1;
	int max = 0;
	int sum = 0;
	int flag = 0;
	cin >> ch[0];
	if (ch[0] < 3 || ch[0]>200) return 0;
	max = ch[0] * ch[0];
	do {
		cin >> ch[i];
		sum += ch[i];
		i++;
	} while (max > sum);

	for (i = 1;; i++)
	{
		for (sum = ch[i]; sum > 0; sum--)
		{
			if (i % 2 != 0)
				cout <<0;
			else
				cout <<1;
			if (++flag % 7 == 0)
				cout << endl;
			if (flag == max)
				return 0;
		}

	}
}