考试订错3---1

方法---暴力

#include<bits/stdc++.h>
using namespace std;
int n,L,R,ansl,ansr,ans;
double s;
bool rope[10009];
int main()
{
    //freopen("dormitory.in","r",stdin);
    //freopen("dormitory.out","w",stdout);
    cin>>n>>s;
    cin>>L>>R;
    for(register int i=1;i<n;i++)
    {
        int l,r;
        scanf("%d%d",&l,&r);
        if(l<L)l=L;//*省去我冗杂的判断
        if(r>R)r=R;
        for(register int j=l;j<=r;j++)
        {
            rope[j]=1;
        }
    }
    for(int i=L;i<=R;i++)
    {
        int ll=i;
        while(rope[i]==0&&i<=R)i++;
        int rr=i-1;
        if(rr-ll+1>ans)//直接得到区间，不必另算，i++的应用注意限制i<=r，不然会错40分
        {
            ans=rr-ll+1;
            ansl=ll;
            ansr=rr;
        }
    }
    if(ans==0)cout<<"0 0"<<endl;
    else cout<<ansl<<" "<<ansr<<endl;
    return 0;
}

我可怜巴巴的40分代码

#include<iostream>
#include<stdio.h>
#include<string.h>
#include<math.h>
#include<algorithm>
#include<map>
using namespace std;
int l1,r1,l,r,n,cnt=0;
int re=0,rr,rl;
int a[10005];
double s;
const int MAXN=999999999;
int main()
{   
    freopen("dormitory.in","r",stdin);
    freopen("dormitory.out","w",stdout);
    int i,j,f=0;
    cin>>n>>s;
    cin>>l1>>r1;
    r1=min(int(s),r1);
    for(i=1;i<=n-1;i++)
    {
        cin>>l>>r;
        if(l>=l1&&r<=r1)
        {
            for(j=l;j<=r;j++) {a[j]=MAXN;}    
        }
        else if(l>=l1&&r>r1)
        {
            for(j=l;j<=r1;j++) {a[j]=MAXN;}        
        }
        else if(l<l1&&r<=r1)
        {
            for(j=l1;j<=r;j++) {a[j]=MAXN;}
        }//改掉此点可得六十分
        
    }
    for(i=l1;i<=r1;i++)
    {  
        if(a[i]!=MAXN) 
        {   
            cnt++;
            if(cnt==1) {l=i;}
            continue;    
        }
        if(cnt>re){
          r=i-1;    
          re=cnt;
          cnt=0;
          rr=r;
          rl=l;    
        } 
    }
    if(rl!=rr)  cout<<rl<<" "<<rr<<endl;
    else cout<<"0"<<" "<<"0"<<endl;
    return 0;
}