oj.uz

Submission #1050179

# Submission time Handle Problem Language Result Execution time Memory
1050179 2024-08-09T07:52:35 Z vjudge1 Art Exhibition (JOI18_art) C++17
0 / 100
 0 ms 344 KB 
#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);
}

Compilation message

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 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 50.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -