Submission #685349

#	Time	Username	Problem	Language	Result	Execution time	Memory
685349		Nursik	Painting Walls (APIO20_paint)	C++17	28 / 100	1582 ms	33148 KiB

paint

#include "paint.h"

#include <vector>
#include <iostream>
#include <set>
#include <map>
#include <cmath>

using namespace std;

#define pb push_back
#define f first
#define s second
#define ll long long

const int maxn = 1e6 + 200, maxm = 1e3 + 200, inf = 1e9;

int n, m, k;
int is[maxn], dp[maxn], t[maxn * 4];
void upd(int pos, int val, int v = 1, int tl = 0, int tr = n - 1){
    if (tl == tr){
        t[v] = val;
        return;
    }
    int tm = (tl + tr) / 2;
    if (pos <= tm)
        upd(pos, val, v + v, tl, tm);
    else
        upd(pos, val, v + v + 1, tm + 1, tr);
    t[v] = min(t[v + v], t[v + v + 1]);
}
int get(int l, int r, int v = 1, int tl = 0, int tr = n - 1){
    if (l <= tl && tr <= r){
        return t[v];
    }
    if (l > tr || r < tl)
        return inf;
    int tm = (tl + tr) / 2;
    return min(get(l, r, v + v, tl, tm), get(l, r, v + v + 1, tm + 1, tr));
}
vector<int> g[maxn];
int minimumInstructions(int N, int M, int K, vector<int> C, vector<int> A, vector<vector<int>> B) {
    n = N, m = M, k = K;
    for (int i = 0; i < m; ++i){
        for (auto it : B[i]){
            g[it].pb(i);
        }
    }
    for (int i = m - 1; i < n; ++i){
        for (auto it : g[C[i]]){
            int x = it;
            int ok = 1;
            int z = 0;
           /* if (i == n - 1){
                cout << x << '\n';
            }*/
            while (z < m){
                int ok2 = 0;
                for (auto it2 : B[x]){
                    if (C[i - z] == it2){
                        ok2 = 1;
                        break;
                    }
                }
                if (ok2 == 0){
                    ok = 0;
                    break;
                }
                x = (x - 1 + m) % m;
                z += 1;
            }
            if (ok == 1){
                is[i] = 1;
                break;
            }
        }
    }
    for (int i = 0; i < n; ++i){
        dp[i] = inf;
        upd(i, dp[i]);
    }
    if (is[m - 1] > 0){
        dp[m - 1] = 1;
        upd(m - 1, 1);
    }
    for (int i = m; i < n; ++i){
        if (is[i] > 0){
            dp[i] = min(dp[i], get(i - m, i - 1) + 1);
        }
        upd(i, dp[i]);
    }
    if (dp[n - 1] == inf){
        dp[n - 1] = -1;
    }
    return dp[n - 1];
}

• Subtask 1: 0 / 12
• Subtask 2: 15 / 15
• Subtask 3: 13 / 13
• Subtask 4: 0 / 23
• Subtask 5: 0 / 37