PTA 打印沙漏

https://pintia.cn/problem-sets/17/problems/260

#include <bits/stdc++.h>

using namespace std;

int main()
{
    int N;
    char sign;
    cin >> N >> sign;
    int count = ;
    while ( * count * count -  <= N)
    {
        count++;
    }
    count--;

    for (int i = ; i <  * count - ; i++)
    {
        for (int j = ; j < count -  - abs(count -  - i); j++)
        {
            printf(" ");
        }
        for (int j = ; j <  * abs(count -  - i) + ; j++)
        {
            printf("%c", sign);
        }
        printf("\n");
    }
    printf("%d", N - ( * count * count - ));
    return ;
}