Submission #505946

#	Time	Username	Problem	Language	Result	Execution time	Memory
505946		cig32	Art Exhibition (JOI18_art)	C++17	100 / 100	275 ms	32580 KiB

art

#pragma GCC optimize("Ofast")
#include <bits/stdc++.h>
using namespace std;
mt19937_64 rng((int)std::chrono::steady_clock::now().time_since_epoch().count());
const int MAXN = 3e5 + 10;
const int MOD = 1e9 + 7;
#define int long long

int rnd(int x, int y) { // random number generator
  int u= uniform_int_distribution<int>(x, y)(rng); return u;
}

void solve(int tc) {
  int N;
  cin >> N;
  pair<int, int> p[N+1];
  for(int i=1; i<=N; i++) cin >> p[i].first >> p[i].second;
  sort(p+1, p+N+1);
  int ps[N+1] = {};
  for(int i=1; i<=N; i++) ps[i] = ps[i-1] + p[i].second;
  pair<int, int> mx[N+2];
  mx[N+1] = {-1e16, N + 1};
  for(int i=N; i>=1; i--) {
    mx[i] = max(mx[i+1], {ps[i] - p[i].first, i});
  }
  int ans = 0;
  for(int i=1; i<=N; i++) ans = max(ans, mx[i].first - ps[i-1] + p[i].first);
  cout << ans << "\n";
}

int32_t main(){
  ios::sync_with_stdio(0); cin.tie(0);
  int t = 1; //cin >> t;
  for(int i=1; i<=t; i++) solve(i);
}

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