Submission #669848

#	Time	Username	Problem	Language	Result	Execution time	Memory
669848		raysh07	Art Exhibition (JOI18_art)	C++17	100 / 100	215 ms	24972 KiB

art

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

mt19937_64 RNG(chrono::steady_clock::now().time_since_epoch().count());

void Solve() 
{
    int n;
    cin>>n;
    
    vector <pair<int, int>> v;
    int ma = 0;
    for (int i=0; i<n; i++)
    {
        int m, t;
        cin>>m>>t;
        v.push_back({m, t});
        ma = max(ma, t);
    }
    sort(v.begin(), v.end());
    int psum[n+1];
    psum[0] = 0;
    for (int i=1; i<=n; i++)
    {
        psum[i] = psum[i-1] + v[i-1].second;
    }
    
    //int ma = -1e9;
    int mi = 1e18;
    int pos = 0;
    for (int i=0; i<n; i++)
    {
        int v2 = psum[i]-v[i].first;
        int v1 = psum[i+1] - v[i].first;
        ma = max(ma, v1-mi);
        mi = min(mi, v2);
    }
    cout<<ma<<"\n";
}

int32_t main() 
{
    auto begin = std::chrono::high_resolution_clock::now();
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int t = 1;
    //cin >> t;
    for(int i = 1; i <= t; i++) 
    {
        //cout << "Case #" << i << ": ";
        Solve();
    }
    auto end = std::chrono::high_resolution_clock::now();
    auto elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(end - begin);
    cerr << "Time measured: " << elapsed.count() * 1e-9 << " seconds.\n"; 
    return 0;
}

Compilation message (stderr)

art.cpp: In function 'void Solve()':
art.cpp:31:9: warning: unused variable 'pos' [-Wunused-variable]
   31 |     int pos = 0;
      |         ^~~

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