Submission #961222

#	Time	Username	Problem	Language	Result	Execution time	Memory
961222		seriouslyFlawed	Rabbit Carrot (LMIO19_triusis)	C++17	0 / 100	1 ms	456 KiB

triusis

//#pragma GCC optimize("03,unroll-loops")

#include <bits/stdc++.h>

using namespace std;

// Shortcuts for common operations
#define pb push_back
#define p push
#define ppb pop_back
#define f first
#define s second
#define all(x) (x).begin(), (x).end()
#define ll long long
//#define int ll
#define endl "\n"
#define sz(x) (int)x.size()

// Type definitions for convenience
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<vll> vvll;
typedef vector<bool> vb;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef vector<vi> vvi;
typedef vector<pii> vii;

// Debugging macros
#define debug(x) cerr << #x << " = " << (x) << '\n'
#define debug_vector(v) _debug_vector(#v, v)
template<typename T>
void _debug_vector(const string& name, const vector<T>& a) {
    cerr << name << " = [ ";
    for(const auto &x : a) cerr << x << ' ';
    cerr << "]\n";
}

// I/O redirection for local testing
#define iofile(io) \
        freopen((io + ".in").c_str(), "r", stdin); \
        freopen((io + ".out").c_str(), "w", stdout);

// delta for floodfill
vi dx = {0, 1, 0, -1};
vi dy = {1, 0, -1, 0};

// extended deltas for floodfill
vi edx = {0, 1, 0, -1, 1, 1, -1, -1};
vi edy = {1, 0, -1, 0, 1, -1, 1, -1};

// Common outputs
void yes() { cout << "YES" << '\n'; }
void no() { cout << "NO" << '\n'; }


void fx() {
    int n, delta;
    cin >> n >> delta;

    n++;
    vi tab(n);
    tab[0] = 0;

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

    for(int i = n-1; i >= 1; i--) { 
        if(tab[i] <= tab[i-1]) tab.ppb();
        else break;
    }
    
    n = tab.size();

    vii dp(n);
    dp[0] = {1, 0};
    for(int i = 1; i < n; i++){
        dp[i] = {(tab[i] <= delta*(i+1)), i};
        for(int j = i-1; j >= 0; j--) if(tab[j] >= tab[i] - abs(j-i)*delta and tab[j] <= delta*(j+1)){
            if(dp[j].f +1 > dp[i].f) dp[i] = {dp[j].f+1, j};
        }
    }

    int best = 0, last = 0;

    for(int i = 0; i < n; i++){
        if(dp[i].f > best){
            best = dp[i].f;
            last = i;
        }
    }

    cout << (n-best) << endl;
    return;

    set<int>s;
    while(true){
        s.insert(last);
        if(last == dp[last].s) break;
        last = dp[last].s;
    }
    
    int cnt = 0;
    int lvl = 0;
    for(int i = 0; i < n; i++){
        if(tab[i] - lvl > delta){
            cnt++;
            lvl += delta;
        }else if (!s.count(i)){
            cnt++;
            lvl += delta;
        }
    }
    
    cout << cnt << endl;
}

signed main() {

    cin.tie(0)->sync_with_stdio(0);
    // Uncomment the following lines for file I/O
    // iofile(string("hello"));
    
    // Uncomment the following lines for multiple test cases
    // int t; cin >> t; while(t--) fx();
    
    // Single test case
    fx();
    
    return 0;
}

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