求助10分，死活调不出来了！

phoenixzhan @ 2023-08-20 13:15:26

#include <bits/stdc++.h>
using namespace std;
int l, m,b[10001];
signed main() {
    cin>>l>>m;
    for(int i=0;i<=l;i++)b[i]=1;//初始化 
    for(int i=1;i<=m;i++){
        int u,v;
        cin>>u>>v;//输入
        for(int j=u;j<=v;j++)//for循环 
            if(b[j]!=0)b[j]=0; 
    }
    int ans=0;
    for(int i=0;i<=m;i++)
        if(b[i])ans+=1;//ans=ans+1
    printf("%d",ans);
    return 0;
}

by xiazeyu123 @ 2023-08-20 13:21:23

for(int i=0;i<=l;i++)

by xiazeyu123 @ 2023-08-20 13:21:40

@_CCF

by phoenixzhan @ 2023-08-20 13:22:41

@xiazeyu123 哪一行啊？

by phoenixzhan @ 2023-08-20 13:23:30

@xiazeyu123 谢谢大佬，已经AC了

by xiazeyu123 @ 2023-08-20 13:24:05

@_CCF 倒数第5行

by phoenixzhan @ 2023-08-20 13:25:51

@xiazeyu123 谢谢，找到了

by phoenixzhan @ 2023-08-20 13:26:52

草绿色的AC: https://www.luogu.com.cn/record/121900001

by phoenixzhan @ 2023-08-20 13:39:23

@xiazeyu123 大佬做了56道红题，%%%，教教蒟蒻怎么快速做红题

现在做一道红题需要20min~1h不等，tcl

by Heartstrings @ 2023-08-20 13:44:17

@_CCF ？？？一道红题要这么久吗

确定不是20s~1min不等

by phoenixzhan @ 2023-08-20 13:46:04

@lonely_conqueror 经常一调20~40分钟，tcl