求助大佬，为什么一个没对

Coke666zzx @ 2024-11-26 00:16:18

#include <iostream>
using namespace std;
int main()
{
    int a[10001]={},l,m,u,v,cnt;
    cin>>l>>m;
    for(int j=1;j<=m;j++)
    {
        cin>>u>>v;
        for(int s=u;s<=v;s++)
        {
            a[s]=1;
        }
    }
    for(int c=0;c<=l;c++)
    {
        if(a[c]==0)
        {
            cnt++;
        }
    }
    cout<<cnt;
    return 0;
}

by kevin110609 @ 2024-11-26 07:39:04

#include <iostream>

using namespace std;

int main(){
    int i,j,k,m,n,l,sum=0;
    int a[10001],q,z; 
    cin>>l>>m;
    for(i=0;i<=l;i++)a[i]=0;
    for(i=1;i<=m;i++){
        cin>>q>>z;   
        for(j=q;j<=z;j++){
            if(a[j]==0)a[j]++;
        }
    }
    for(i=0;i<=l;i++){
        if(a[i]==0)sum++;
    }
    cout<<sum;
    return 0;
}

看看这个

by kevin110609 @ 2024-11-26 07:39:30

cnt没有赋初值

by Coke666zzx @ 2024-11-26 23:00:24

@kevin110609谢谢