Submission #926300

#	Time	Username	Problem	Language	Result	Execution time	Memory
926300		VMaksimoski008	Global Warming (CEOI18_glo)	C++14	38 / 100	2056 ms	14892 KiB

glo

#include <bits/stdc++.h>

#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
//#define int long long

using namespace std;

using ll = long long;
using ull = unsigned long long;
using ld = long double;
using pii = pair<int, int>;
using pll = pair<ll, ll>;

const int mod = 1e9 + 7;
const int LOG = 20;
const int maxn = 1e5 + 5;
const double eps = 1e-9;

struct BIT {
    int n;
    vector<int> tree;

    void config(int _n) {
        n = _n + 10;
        tree.resize(_n+60);
    }

    void update(int p, int v) {
        for(p++; p<n; p+=p&-p) tree[p] = max(tree[p], v);
    }

    int query(int p) {
        int ans = 0;
        for(p++; p>0; p-=p&-p) ans = max(ans, tree[p]);
        return ans;
    }

    void clear() { for(int i=0; i<tree.size(); i++) tree[i] = 0; }
};

int32_t main() {
    int n, X, ans = 0;
    cin >> n >> X;

    set<int> s;
    vector<int> v(n+1);

    for(int i=1; i<=n; i++) {
        cin >> v[i];
        s.insert(v[i]); s.insert(v[i] - X);
    }

    vector<int> comp(all(s));

    BIT bit;
    bit.config(2*n);
    for(int i=0; i<=(X==0?0:n); i++) {
        v[i] -= X;

        for(int i=1; i<=n; i++) {
            int p = lower_bound(all(comp), v[i]) - comp.begin();
            bit.update(p, bit.query(p-1) + 1);
        }

        ans = max(ans, bit.query(2*n));
        bit.clear();
    }

    cout << ans << '\n';
    return 0;
}

Compilation message (stderr)

glo.cpp: In member function 'void BIT::clear()':
glo.cpp:40:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |     void clear() { for(int i=0; i<tree.size(); i++) tree[i] = 0; }
      |                                 ~^~~~~~~~~~~~

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