Submission #889423

#	Time	Username	Problem	Language	Result	Execution time	Memory
889423		htphong0909	Global Warming (NOI13_gw)	C++17	40 / 40	250 ms	17144 KiB

gw

#include<bits/stdc++.h>
using namespace std;

void File() {
#define file "test"
    freopen(file".in", "r", stdin);
    freopen(file".out", "w", stdout);
}

int arr[1000001];

int32_t main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
    vector <int> ed;
    //File();
    int n;
    cin >> n;
    for (int i = 1; i <= n; i++)
    {
        cin >> arr[i];
        if (i > 1) ed.emplace_back(min(arr[i], arr[i - 1]));
    }
    sort(arr + 1, arr + 1 + n);
    sort(ed.begin(), ed.end());
    int p = 0;
    int ans = 0;
    for (int i = 0; i < n - 1; i++)
    {
        while (p + 1 < n && arr[p + 1] <= ed[i]) p++;
        ans = max(ans, 2 + i - p);
    }
    cout << ans;
    return 0;
}

Compilation message (stderr)

gw.cpp: In function 'void File()':
gw.cpp:6:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    6 |     freopen(file".in", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
gw.cpp:7:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    7 |     freopen(file".out", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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