Submission #895327

#	Time	Username	Problem	Language	Result	Execution time	Memory
895327		Isam	Art Exhibition (JOI18_art)	C++17	0 / 100	0 ms	348 KiB

art

#include<bits/stdc++.h>
using namespace std;
constexpr int sz = 1e6 + 5;
signed main(){
	ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
	int N;
	cin >> N;
	vector<pair<int, int>> A(N+1);
	vector<long long> pref(N), cost(N);
	for(register int i(0); i < N; ++i){
		cin >> A[i].first >> A[i].second;
	}
	sort(A.begin(), A.end());
	for(register int i(0); i < N; ++i){
		pref[i] = (i ? pref[i-1] : 0ll) + A[i].second;
	}
	for(register int i(N - 1); i >= 0; --i){
		cost[i] = max((i < N - 1 ? cost[i+1] : -100000000), pref[i] - A[i].first);
	}
	long long ans{-1000000000};
	for(register int i(0); i < N; ++i){
		ans = max(ans, cost[i] - ((i ? pref[i-1] : 0ll) - A[i].first));
	}
	cout << ans << '\n';
	return 0;
}

Compilation message (stderr)

art.cpp: In function 'int main()':
art.cpp:10:19: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   10 |  for(register int i(0); i < N; ++i){
      |                   ^
art.cpp:14:19: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   14 |  for(register int i(0); i < N; ++i){
      |                   ^
art.cpp:17:19: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   17 |  for(register int i(N - 1); i >= 0; --i){
      |                   ^
art.cpp:21:19: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   21 |  for(register int i(0); i < N; ++i){
      |                   ^

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