Submission #550006

#	Time	Username	Problem	Language	Result	Execution time	Memory
550006		Tien_Noob	Global Warming (CEOI18_glo)	C++17	100 / 100	43 ms	3808 KiB

glo

//Make CSP great again
//Vengeance
#include <bits/stdc++.h>
#define TASK "TESTCODE"
#define Log2(x) 31 - __builtin_clz(x)
using namespace std;
const int N = 2e5;
int dp[2][N + 1], n, x;
int res = 0;
void read()
{
    cin >> n >> x;
    for (int i = 1; i <= n; ++ i)
    {
        int a;
        cin >> a;
        dp[0][i] = dp[1][i] = INT_MAX;
        int j = lower_bound(dp[1] + 1, dp[1] + i + 1, a) - dp[1];
        dp[1][j] = a;
        res = max(res, j);
        j = lower_bound(dp[0] + 1, dp[0] + i + 1, a - x) - dp[0];
        dp[0][j] = a - x;
        dp[1][j] = min(dp[1][j], dp[0][j]);
    }
    cout << res;
}
void solve()
{

}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    if (fopen(TASK".INP", "r"))
    {
        freopen(TASK".INP", "r", stdin);
        //freopen(TASK".OUT", "w", stdout);
    }
    int t = 1;
    bool typetest = false;
    if (typetest)
    {
        cin >> t;
    }
    for (int __ = 1; __ <= t; ++ __)
    {
        //cout << "Case " << __ << ": ";
        read();
        solve();
    }
}

Compilation message (stderr)

glo.cpp: In function 'int main()':
glo.cpp:37:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |         freopen(TASK".INP", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 13 / 13
• Subtask 4: 10 / 10
• Subtask 5: 20 / 20
• Subtask 6: 17 / 17
• Subtask 7: 25 / 25