70分求助大佬！

woodQ @ 2023-08-08 17:59:42

#include<iostream>
using namespace std;

int main()
{
    int arr[100000] = {};
    int l, m,u, v,a=0;
    cin >> l >> m;
    for (int i = 0; i < m; i++)
    {
        cin >> u >> v;
        for (int j = u; j <= v; j++)
        {
            arr[j] = 1;
        }
    }
    for (int x = 0; x < l; x++)
    {
        a += arr[x];
    }
    cout << l-a+1;
}

by ybc2025chenyuyang @ 2023-08-08 18:01:17

@woodQ 同样的错误

by woodQ @ 2023-08-08 18:19:26

@ybc2025125chenyuyang 能不能教一下怎么改？qwq

by ybc2025chenyuyang @ 2023-08-08 18:21:18

@woodQ 最后一个循环条件改成x<=l

by woodQ @ 2023-08-08 18:24:19

@ybc2025125chenyuyang l不是我输入的区域大小吗，数组从0开始循环到l的话区域不就变多了一个吗？

by ybc2025chenyuyang @ 2023-08-08 18:26:29

@woodQ 如果你这么做只有l个呀

by ybc2025chenyuyang @ 2023-08-08 18:27:09

@woodQ 就是要多一个呀,看看题

by woodQ @ 2023-08-08 18:28:55

@ybc2025125chenyuyang 明白了，我眼瞎了QWQ