Submission #1181915

#	Time	Username	Problem	Language	Result	Execution time	Memory
1181915		vyaduct	Art Exhibition (JOI18_art)	C++20	100 / 100	110 ms	12112 KiB

art

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

#ifdef LOCAL
#include "debug.h"
#else
#define dbg(x) 42
#endif

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
#define P           pair

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> pref(n+1, 0);
  for (int i=0;i<n;i++) pref[i+1] = pref[i] + A[i].S;

  ll sum=0, best=0;
  for (int i=0;i<n;i++){
    if (i>0)sum = max(sum + A[i].S + A[i-1].F - A[i].F, A[i].S);
    else sum = A[i].S;
    best = max(best, sum);
  }
  cout << best << 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:13:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |     freopen(in.c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
art.cpp:14:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |     freopen(out.c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

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