Submission #934016

#	Time	Username	Problem	Language	Result	Execution time	Memory
934016		Amirreza_Fakhri	Global Warming (CEOI18_glo)	C++17	27 / 100	40 ms	4588 KiB

glo

// In the name of the God
#include <bits/stdc++.h>
#define ll long long
// #define int long long
#define pb push_back
#define F first
#define S second
#define mp make_pair
#define pii pair <int, int>
#define smin(x, y) (x) = min((x), (y))
#define smax(x, y) (x) = max((x), (y))
#define all(x) (x).begin(), (x).end()
using namespace std;

const int inf = 1e9+7;
const int mod = 998244353;
const int maxn = 2e5+5;

int n, x, a[maxn], b[maxn], c[maxn];
vector <int> vec;

int32_t main() {
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin >> n >> x;
    for (int i = 0; i < n; i++) {
        cin >> a[i];
        int j = lower_bound(all(vec), a[i])-vec.begin();
        b[i] = j+1;
        if (j == vec.size()) vec.pb(a[i]);
        else vec[j] = a[i];
        j = lower_bound(all(vec), a[i]+x)-vec.begin();
        c[i] = j+1;
    }
    vec.clear();
    int ans = 0;
    for (int i = n-1; i >= 0; i--) {
        int j = lower_bound(all(vec), -a[i])-vec.begin();
        if (j == vec.size()) vec.pb(-a[i]);
        else vec[j] = -a[i];
        smax(ans, c[i]+j);
    }
    cout << ans << '\n';
    return 0;
}

Compilation message (stderr)

glo.cpp: In function 'int32_t main()':
glo.cpp:29:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |         if (j == vec.size()) vec.pb(a[i]);
      |             ~~^~~~~~~~~~~~~
glo.cpp:38:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   38 |         if (j == vec.size()) vec.pb(-a[i]);
      |             ~~^~~~~~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 10
• Subtask 3: 0 / 13
• Subtask 4: 10 / 10
• Subtask 5: 0 / 20
• Subtask 6: 17 / 17
• Subtask 7: 0 / 25