Submission #333666

#	Time	Username	Problem	Language	Result	Execution time	Memory
333666		ncduy0303	Global Warming (NOI13_gw)	C++17	40 / 40	262 ms	17772 KiB

gw

#include <bits/stdc++.h>

using namespace std;

#define ar array
#define ll long long

const int MAX_N = 1e5 + 1;
const int MOD = 1e9 + 7;
const int INF = 1e9;
const ll LINF = 1e18;



void solve() {
    int n; cin >> n;
    vector<ar<int,2>> a(n);
    for (int i = 0; i < n; i++) {
        int x; cin >> x;
        a[i] = {x, i + 1};
    }
    sort(a.rbegin(), a.rend()); // sort by decreasing height
    int ans = 0, cur = 0;
    vector<bool> used(n + 2);
    for (int i = 0; i < n; i++) {
        used[a[i][1]] = true; cur++;
        if (used[a[i][1] - 1]) cur--; 
        if (used[a[i][1] + 1]) cur--;
        if (i == n - 1 || a[i][0] != a[i + 1][0]) ans = max(ans, cur); 
    }
    cout << ans << "\n";
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    // freopen("input.txt", "r", stdin);
    // freopen("output.txt", "w", stdout);

    int tc = 1;
    // cin >> tc;
    for (int t = 1; t <= tc; t++) {
        // cout << "Case #" << t  << ": ";
        solve();
    }
}

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