Submission #896524

#	Time	Username	Problem	Language	Result	Execution time	Memory
896524		duckindog	Art Exhibition (JOI18_art)	C++14	100 / 100	148 ms	24924 KiB

art

// from duckindog wth depression
#include<bits/stdc++.h>

using namespace std;

#define int long long

const int N = 5e5 + 10;
int n;
pair<int, int> p[N];
int f[N];

int32_t main() {
  cin.tie(0)->sync_with_stdio(0);

  if (fopen("duck.inp", "r")) {
    freopen("duck.inp", "r", stdin);
    freopen("duck.out", "w", stdout);
  }
  cin >> n;
  for (int i = 1; i <= n; ++i) cin >> p[i].first >> p[i].second;
  sort(p + 1, p + n + 1);

  p[0] = p[1];
  for (int i = 1; i <= n; ++i) {
    int a, b; tie(a, b) = p[i];
    f[i] = max(f[i - 1] + p[i - 1].first - a + b, b);
  }
  cout << *max_element(f + 1, f + n + 1);
}

Compilation message (stderr)

art.cpp: In function 'int32_t main()':
art.cpp:17:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |     freopen("duck.inp", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
art.cpp:18:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |     freopen("duck.out", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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