제출 #1050179

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1050179		vjudge1	Art Exhibition (JOI18_art)	C++17	0 / 100	0 ms	344 KiB

art

#include <bits/stdc++.h>
using namespace std;
#define ll long long int
int main() {
    int n;
    cin>>n;
    vector<pair<ll,ll>> v;
    ll s=0;
    for(int i=0; i<n; i++) {
        ll t1,t2;
        cin>>t1>>t2;
        s+=t2;
        v.push_back({t1,0-t2});
    }
    sort(v.begin(),v.end());
    for(int i=0; i<v.size(); i++)
        v[i].second=0-v[i].second;
    ll mn=0,mx=n-1,fmn=0,fmx=n-1;
    s-=v[mx].first-v[mn].first;
    ll s2=s;
    while(fmn<mx) {
        //cout<<"currently "<<mn<<' '<<mx<<' '<<s<<'\n';
        ll tans=s;
        for(int j=mn; j<=fmn; j++) {
            //cout<<tans<<"+=("<<v[j+1].first<<"-"<<v[j].first<<")-"<<v[j].second<<"=";
            tans+=(v[j+1].first-v[j].first)-v[j].second;
            //cout<<tans<<'\n';
        }
        if(tans>s) {
            mn=fmn+1;
            s=tans;
            //cout<<"\n\n";
        }
        //else cout<<"but it didn't matter\n\n";
        fmn++;
    }
    while(mn<fmx) {
        //cout<<"currently "<<mn<<' '<<mx<<' '<<s<<'\n';
        ll tans=s;
        for(int j=mx; j>=fmx; j--) {
            //cout<<tans<<"+=("<<v[j].first<<"-"<<v[j-1].first<<")-"<<v[j].second<<"=";
            tans+=(v[j].first-v[j-1].first)-v[j].second;
            //cout<<tans<<'\n';
        }
        if(tans>s) {
            mx=fmx-1;
            s=tans;
            //cout<<"\n\n";
        }
        //else cout<<"but it didn't matter\n\n";
        fmx--;
    }
    mn=0;
    mx=n-1;
    fmn=0;
    fmx=n-1;
    while(mn<fmx) {
        //cout<<"currently "<<mn<<' '<<mx<<' '<<s2<<'\n';
        ll tans=s2;
        for(int j=mx; j>=fmx; j--) {
            //cout<<tans<<"+=("<<v[j].first<<"-"<<v[j-1].first<<")-"<<v[j].second<<"=";
            tans+=(v[j].first-v[j-1].first)-v[j].second;
            //cout<<tans<<'\n';
        }
        if(tans>s2) {
            mx=fmx-1;
            s2=tans;
            //cout<<"\n\n";
        }
        //else cout<<"but it didn't matter\n\n";
        fmx--;
    }
    while(fmn<mx) {
        //cout<<"currently "<<mn<<' '<<mx<<' '<<s2<<'\n';
        ll tans=s2;
        for(int j=mn; j<=fmn; j++) {
            //cout<<tans<<"+=("<<v[j+1].first<<"-"<<v[j].first<<")-"<<v[j].second<<"=";
            tans+=(v[j+1].first-v[j].first)-v[j].second;
            //cout<<tans<<'\n';
        }
        if(tans>s2) {
            mn=fmn+1;
            s2=tans;
            //cout<<"\n\n";
        }
        //else cout<<"but it didn't matter\n\n";
        fmn++;
    }
    cout<<max(s,s2);
}

컴파일 시 표준 에러 (stderr) 메시지

art.cpp: In function 'int main()':
art.cpp:16:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |     for(int i=0; i<v.size(); i++)
      |                  ~^~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 50