Submission #770915

#	Time	Username	Problem	Language	Result	Execution time	Memory
770915		dxz05	Rabbit Carrot (LMIO19_triusis)	C++17	0 / 100	1 ms	468 KiB

triusis

#pragma GCC optimize("Ofast,O3,unroll-loops")
#pragma GCC target("avx,avx2")

#include <bits/stdc++.h>

using namespace std;

#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define bpc(x) __builtin_popcount(x)
#define bpcll(x) __builtin_popcountll(x)
#define MP make_pair
//#define endl '\n'

mt19937 rng(chrono::high_resolution_clock::now().time_since_epoch().count());

typedef long long ll;
const int MOD = 1e9 + 7;
const int N = 5005;

map<int, int> dp[N];
int a[N];

void solve(){
    int n, k;
    cin >> n >> k;

    for (int i = 1; i <= n; i++) cin >> a[i];

    dp[0][0] = 0;

    for (int i = 1; i <= n; i++){
        set<int> s = {a[i]};
        for (auto y : dp[i - 1]) s.insert(y.first);

        for (int h : s){
            auto it = dp[i - 1].lower_bound(h - k);
            if (it != dp[i - 1].end()){
                dp[i][h] = it->second + (a[i] != h);
            }
        }

        int mn = 1e9;
        for (auto rit = dp[i].rbegin(); rit != dp[i].rend(); rit++){
            mn = min(mn, rit->second);
            rit->second = min(rit->second, mn);
        }
    }

    cout << dp[n].begin()->second << endl;

}

int main(){
    clock_t startTime = clock();
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);

#ifdef LOCAL
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#endif

    int test_cases = 1;
//    cin >> test_cases;

    for (int test = 1; test <= test_cases; test++){
        //cout << (solve() ? "YES" : "NO") << endl;
        solve();
    }

#ifdef LOCAL
    cerr << "Time: " << int((double) (clock() - startTime) / CLOCKS_PER_SEC * 1000) << " ms" << endl;
#endif

    return 0;
}

Compilation message (stderr)

triusis.cpp: In function 'int main()':
triusis.cpp:55:13: warning: unused variable 'startTime' [-Wunused-variable]
   55 |     clock_t startTime = clock();
      |             ^~~~~~~~~

• Subtask 1: 0 / 14
• Subtask 2: 0 / 21
• Subtask 3: 0 / 28
• Subtask 4: 0 / 37