Submission #832794

#	Time	Username	Problem	Language	Result	Execution time	Memory
832794		manhtuan22007	Art Exhibition (JOI18_art)	C++14	100 / 100	148 ms	24776 KiB

art

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



int32_t main()
{
	cin.tie(0)->sync_with_stdio(0);
	if(fopen(".inp" , "r")){
		freopen(".inp" , "r" , stdin);
		freopen(".out" , "w" , stdout);
	}
	int n;
	cin >> n;
	vector<pair<int , int>> a;
	a.push_back({0 , 0});
	for(int i = 1 ; i <= n ; i ++){
		int x , y;
		cin >> x >> y;
		a.push_back({x , y});
	}
	sort(a.begin() , a.end());
	vector<int> dp(n + 5);
	dp[1] = a[1].second;
	for(int i = 2 ; i <= n ; i ++){
		dp[i] = max(dp[i - 1] + a[i].second - (a[i].first - a[i - 1].first) , a[i].second);
	}
	cout << *max_element(dp.begin() , dp.end());
}	

Compilation message (stderr)

art.cpp: In function 'int32_t main()':
art.cpp:12:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |   freopen(".inp" , "r" , stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
art.cpp:13:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |   freopen(".out" , "w" , stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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