90分求助

wangmang @ 2022-11-12 13:59:26

#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n,m,l;
    cin>>n>>m;
    l=n+1;
    char a[n+10];
    int b[m+10],c[m+10];
    for(int i=1;i<=n;i++)
    {
        a[i]='y';
    }
    for(int i=1;i<=m;i++)
    {
        cin>>b[i]>>c[i];
        for(int o=b[i];o<=c[i];o++)
        {
            if(a[o]=='y')
            {
                a[o]='m';
                l--;
            }
        }
    }
    cout<<l;
    return 0;
}

by Literally114514 @ 2022-11-12 14:12:36

@lllll1l11111

#include <iostream>
using namespace std;
int shu[10010];
int main(){
    int n,m,a,b,sum=0;
    cin>>n>>m;
    for(int i=0;i<=n;i++){
        shu[i]=1;
    }
    for(int i=1;i<=m;i++){
        cin>>a>>b;
        for(int j=a;j<=b;j++){
            shu[j]=0;
        }
    }
    for(int i=0;i<=n;i++){
        if(shu[i]==1){
            sum++;
        }
    }
    cout<<sum;
    return 0;
} 

by wssb1919810 @ 2022-11-12 14:24:38

#include<bits/stdc++.h>
using namespace std;
int a[10001],s[101],e[101],l,m,ans;
int main(){
    cin>>l>>m;
    for(int i=0;i<m;i++){
        cin>>s[i]>>e[i];
        for(int j=s[i];j<=e[i];j++) a[j]=1;
    }
    for(int i=0;i<=l;i++) if(a[i]==0) ans++;
    cout<<ans;
}