Submission #1029453

#	Time	Username	Problem	Language	Result	Execution time	Memory
1029453		rsinventor	Global Warming (NOI13_gw)	C++17	23 / 40	163 ms	21516 KiB

gw

#include <bits/stdc++.h>

using namespace std;

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.begin(), sh2.end());

    int mx_islands = 0;
    int islands = 0;
    for(int i = 0; i < n; i++) {
        if(max(0, h[i])>0 && (i==0 || max(0, h[i-1])==0)) islands++;
    }
    mx_islands = max(mx_islands, islands);
    for(int i = 0; i < sh2.size(); i++) {
        int s = sh2[i].second;
        islands++;
        if(h[s+1]<h[s]) {
            islands--;
        }
        if(h[s-1]<=h[s]) {
            islands--;
        }
        mx_islands = max(mx_islands, islands);
    }

    cout << mx_islands << endl;


    return 0;
}

Compilation message (stderr)

gw.cpp: In function 'int main()':
gw.cpp:29:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |     for(int i = 0; i < sh2.size(); i++) {
      |                    ~~^~~~~~~~~~~~

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