Submission #1029461

#	Time	Username	Problem	Language	Result	Execution time	Memory
1029461		rsinventor	Global Warming (NOI13_gw)	C++17	40 / 40	157 ms	15952 KiB

gw

#include <bits/stdc++.h>

using namespace std;

constexpr int MAXN = 1e6 + 42;

bool isl[MAXN];

signed main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

//    freopen("warming.in", "r", stdin);
//    freopen("warming.out", "w", stdout);

    int n;
    cin >> n;
    int h[n];
    vector<pair<int, int>> sh2(n);
    for(int i = 0; i < n; i++) {
        cin >> h[i];
        sh2[i].first = h[i];
        sh2[i].second = i;
    }
    sort(sh2.rbegin(), sh2.rend());

    int mx_islands = 0;
    int islands = 0;
    for(int i = 0; i < n; i++) {
        int s = sh2[i].second;
        islands++;
        isl[s] = true;
        if(isl[s+1]) {
            islands--;
        }
        if(isl[s-1]) {
            islands--;
        }
        if(i==n-1 || sh2[i].first!=sh2[i+1].first) {
            mx_islands = max(mx_islands, islands);
        }
//        if(sh2[i].first==20) {
//            cout << islands << endl;
//        }
    }

    cout << mx_islands << endl;


    return 0;
}

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