Submission #1235001

#	Time	Username	Problem	Language	Result	Execution time	Memory
1235001		badge881	Global Warming (CEOI18_glo)	C++20	100 / 100	41 ms	2508 KiB

glo

#include <bits/stdc++.h>
using namespace std;
int main()
{
    int n, d;
    scanf("%d%d\n", &n, &d);
    int a[n], p[n];
    vector<int> lis;
    for (int i = 0; i < n; i++)
    {
        scanf("%d\n", &a[i]);
        size_t ind = lower_bound(lis.begin(), lis.end(), a[i]) - lis.begin();
        if (ind == lis.size())
            lis.push_back(a[i]);
        else
            lis[ind] = a[i];
        p[i] = ind + 1;
    }
    int ans = lis.size();
    lis.clear();
    for (int i = n - 1; i >= 0; i--)
    {
        size_t ind = lower_bound(lis.begin(), lis.end(), -a[i]) - lis.begin();
        if (ind == lis.size())
            lis.push_back(-a[i]);
        else
            lis[ind] = -a[i];
        if (i == 0)
            continue;
        int k = lower_bound(lis.begin(), lis.end(), d - a[i - 1]) - lis.begin();
        ans = max(ans, k + p[i - 1]);
    }
    printf("%d\n", ans);
    return 0;
}

Compilation message (stderr)

glo.cpp: In function 'int main()':
glo.cpp:6:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    6 |     scanf("%d%d\n", &n, &d);
      |     ~~~~~^~~~~~~~~~~~~~~~~~
glo.cpp:11:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |         scanf("%d\n", &a[i]);
      |         ~~~~~^~~~~~~~~~~~~~~

• 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