Submission #1178796

#	Time	Username	Problem	Language	Result	Execution time	Memory
1178796		vyaduct	Art Exhibition (JOI18_art)	C++20	0 / 100	0 ms	320 KiB

art

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

void setIo(string in="", string out=""){
  if (!in.empty() && !out.empty()){
    freopen(in.c_str(), "r", stdin);
    freopen(out.c_str(), "w", stdout);
  }
  ios::sync_with_stdio(false);
  cin.tie(0);
}
 
#define all(c)      (c).begin(), (c).end()
#define sz(c)       (int)(c).size()
#define vt          vector
#define pb          push_back
#define F           first
#define S           second

void solve(){
  int n; cin>>n;
  vt<pair<ll,ll>> A(n);
  for (int i=0;i<n;i++){
    cin>>A[i].F>>A[i].S;
  }

  sort(all(A));

  vt<ll> B(n, 0);
  for (int i=1;i<n;i++) B[i] = A[i].F-A[i-1].F;

  vt<ll> C(n);  
  for (int i=0;i<n;i++) C[i] = A[i].S - B[i];

  vt<ll> P(n+1, 0);
  ll min_pref = 0;
  ll mx;
  ll ans = -1e9;
  for (int i=0;i<n;i++){
    P[i+1] = P[i] + C[i];
    mx = P[i+1] - min_pref;
    min_pref = min(min_pref, P[i+1]);
    ans = max(ans, mx);
  }
  cout << ans << endl;

} 

int main() {
  setIo();
  int tt=1; 
  // cin>>tt;
  while(tt--) solve(); 
  return 0;
} 

Compilation message (stderr)

art.cpp: In function 'void setIo(std::string, std::string)':
art.cpp:7:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    7 |     freopen(in.c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
art.cpp:8:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    8 |     freopen(out.c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

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