Submission #674733

#	Time	Username	Problem	Language	Result	Execution time	Memory
674733		QwertyPi	Arcade (NOI20_arcade)	C++14	100 / 100	261 ms	25712 KiB

Arcade

#include <bits/stdc++.h>
#define int long long
#define fi first
#define se second
using namespace std;

const int MAXM = 5e5 + 11;
int t[MAXM], a[MAXM];

int32_t main(){
	cin.tie(0); cout.tie(0)->sync_with_stdio(false);
	int n, m; cin >> n >> m;
	for(int i = 0; i < m; i++) cin >> t[i];
	for(int i = 0; i < m; i++) cin >> a[i];
	
	vector<pair<int, int>> v;
	for(int i = 0; i < m; i++) v.push_back({t[i] - a[i], t[i] + a[i]});
	sort(v.begin(), v.end(), [](pair<int, int> x, pair<int, int> y){
		return x.fi < y.fi || x.fi == y.fi && x.se < y.se;
	});
	set<int> s; s.insert(1LL << 60);
	for(auto i : v){
		auto ptr = s.upper_bound(i.se);
		if(ptr != s.begin()) {
			s.erase(prev(ptr));
			s.insert(i.se);
		}else{
			s.insert(i.se);
		}
	}
	cout << s.size() - 1 << endl;
}

Compilation message (stderr)

Arcade.cpp: In lambda function:
Arcade.cpp:19:38: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   19 |   return x.fi < y.fi || x.fi == y.fi && x.se < y.se;
      |                                      ^

• Subtask 1: 7 / 7
• Subtask 2: 11 / 11
• Subtask 3: 12 / 12
• Subtask 4: 21 / 21
• Subtask 5: 14 / 14
• Subtask 6: 20 / 20
• Subtask 7: 15 / 15