Submission #157777

#	Time	Username	Problem	Language	Result	Execution time	Memory
157777		ZwariowanyMarcin	Art Exhibition (JOI18_art)	C++14	100 / 100	275 ms	24824 KiB

art

#pragma GCC optimize("O3")
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define ll long long
#define mp make_pair
#define pb push_back
#define ld long double
#define ss(x) (int) x.size()
#define FOR(i, j, n) for(int i = j; i <= n; ++i)
#define fi first
#define se second
#define cat(x) cerr << #x << " = " << x << endl;
#define ios cin.tie(0); ios_base::sync_with_stdio(0)
 
 
using namespace std;	

const int nax = 5e5 + 11;

int n;
pair<ll, int> a[nax];
ll pref[nax];
ll best = -1e18;
ll ans = 0;

int main() {
	scanf("%d", &n);
	FOR(i, 1, n)
		scanf("%lld %d", &a[i].fi, &a[i].se);
	sort(a + 1, a + n + 1);
	FOR(i, 1, n)
		pref[i] = pref[i - 1] + a[i].se;
	best = a[1].fi;
	FOR(i, 1, n) {
		ans = max(ans, pref[i] + best - a[i].fi);
		best = max(best, -pref[i] + a[i + 1].fi);
	}
	printf("%lld", ans);
	
	
	
	return 0;
}

Compilation message (stderr)

art.cpp: In function 'int main()':
art.cpp:28:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
  ~~~~~^~~~~~~~~~
art.cpp:30:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld %d", &a[i].fi, &a[i].se);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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