Submission #1605724

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Source Code Expand

#include<bits/stdc++.h>
using namespace std;

#define int long long

#define rep(i,n) for(int i=0;i<(n);i++)
#define pb push_back
#define all(v) (v).begin(),(v).end()
#define fi first
#define se second
typedef vector<int>vint;
typedef pair<int,int>pint;
typedef vector<pint>vpint;

template<typename A,typename B>inline void chmin(A &a,B b){if(a>b)a=b;}
template<typename A,typename B>inline void chmax(A &a,B b){if(a<b)a=b;}

int N;
int acc[222222];

int A[222222],B[222222];

signed main(){
    cin>>N;
    rep(i,N){
        int a,b;
        cin>>a>>b;
        A[i]=a;B[i]=b;
        acc[a]++;
        acc[b]--;
    }

    rep(i,222222-1)acc[i+1]+=acc[i];

    int ma=*max_element(acc,acc+222222);

    int l=INT_MAX,r=INT_MIN;
    rep(i,222222)if(acc[i]==ma){
        chmin(l,i);
        chmax(r,i);
    }

    rep(i,N){
        if(A[i]<=l&&l<B[i]&&A[i]<=r&&r<B[i]){
            cout<<ma-1<<endl;
            return 0;
        }
    }
    cout<<ma<<endl;
    return 0;
}

Submission Info

Judge Result