Submission #734392

#	Time	Username	Problem	Language	Result	Execution time	Memory
734392		Amaarsaa	Global Warming (NOI13_gw)	C++14	6 / 40	1055 ms	55556 KiB

gw

#include<bits/stdc++.h>
 
using namespace std;
using ll = long long;
ll n, ans, p, j, s, x;
int main() {
	ll i, t, r;
	cin >> n;
	map < int, int > Used, Howmuch;
	vector < pair < ll, ll > > v;
	for ( i = 1; i <= n; i ++) {
		cin >> x;
		Howmuch[x] ++;
		v.push_back(make_pair(x, i));
		
	}	
	ans = 0;
	sort ( v.begin(), v.end());
	r = 0;
	for ( i = n - 1; i >= 0; i --) {
		x = v[i].second;
		if ( Howmuch[v[i].first] == 1) {
			ans ++;
			if ( Used[x + 1] == 1) ans --;
			if ( Used[x - 1] == 1) ans --;
			Used[x] ++;	
		}
		Howmuch[v[i].first] --;
		
		r = max (r, ans);
	}
	cout << r << endl;
}

Compilation message (stderr)

gw.cpp: In function 'int main()':
gw.cpp:7:8: warning: unused variable 't' [-Wunused-variable]
    7 |  ll i, t, r;
      |        ^

• Subtask 1: 6 / 6
• Subtask 2: 0 / 6
• Subtask 3: 0 / 7
• Subtask 4: 0 / 10
• Subtask 5: 0 / 11