Submission #642128

#	Time	Username	Problem	Language	Result	Execution time	Memory
642128		baojiaopisu	Painting Walls (APIO20_paint)	C++14	0 / 100	2 ms	2644 KiB

paint

#include<bits/stdc++.h>

using namespace std;

using ll = long long;
using ld = long double;
using ull = unsigned long long;

using pii = pair<int, int>;
using pll = pair<ll, ll>;
using pld = pair<ld, ld>;

#define fi first
#define se second
#define pb push_back
#define pf push_front
#define mp make_pair
#define ins insert
#define btpc __builtin_popcount
#define btclz __builtin_clz

#define sz(x) (int)(x.size());
#define all(x) x.begin(), x.end()
#define debug(...) " [" << #__VA_ARGS__ ": " << (__VA_ARGS__) << "] "

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

int d4x[4] = {1, 0, -1, 0}; int d4y[4] = {0, 1, 0, -1};
int d8x[8] = {0, 1, 1, 1, 0, -1, -1, -1};
int d8y[8] = {1, 1, 0, -1, -1, -1, 0, 1};

template<class X, class Y>
    bool minimize(X &x, const Y &y) {
        if (x > y)
        {
            x = y;
            return true;
        }
        return false;
    }
template<class X, class Y>
    bool maximize(X &x, const Y &y) {
        if (x < y)
        {
            x = y;
            return true;
        }
        return false;
    }

const int MOD = 1e9 + 7; //998244353

template<class X, class Y>
	void add(X &x, const Y &y) {
		x = (x + y);
		if(x >= MOD) x -= MOD;
	}

template<class X, class Y> 
	void sub(X &x, const Y &y) {
		x = (x - y);
		if(x < 0) x += MOD;
	}

/* Author : Le Ngoc Bao Anh, 12A5, LQD High School for Gifted Student*/

const ll INF = 1e9;
const int N = 1e5 + 10;

int f[N], p[N];
vector<int> orr[N];
bool ok[N];
int cnt = 0;

void sub(int id, int m, int x) {
	for(auto pos : orr[x]) {
		pos = (pos - id + m) % m;
		--f[pos];
		if(f[pos] == m - 1) --cnt;
	}
}

void add(int id, int m, int x) {
	for(auto pos : orr[x]) {
		pos = (pos - m + 1) % m;
		pos = (pos + m) % m;
		pos = (pos - id + m) % m;
		++f[pos];
		if(f[pos] == m) ++cnt;
	}
}

int minimumInstructions(int n, int m, int k, vector<int> c, vector<int> a, vector<vector<int>> b) {
	for(int i = 0; i < m; i++) {
		for(auto x : b[i]) orr[x].pb(i);
	}

	for(int i = 0; i < m; i++) {
		int x = c[i];
		for(auto pos : orr[x]) {
			 pos = (pos + m - i) % m;
			 ++f[pos];
			 if(f[pos] == m) ++cnt;
		}
	}
	ok[0] = cnt;

	for(int i = m; i < n; i++) {
		sub(i - m, m, c[i - m]);
		add(i - m + 1, m, c[i]);
		ok[i - m + 1] = cnt;
	}	

	p[0] = -INF;
	for(int i = 0; i <= n; i++) {
		if(i > 0) p[i] = p[i - 1];
		if(ok[i]) p[i] = i;
	}
	int ans = 0;
	int last = 0;
	while(last < n - 1) {
		if(p[last + 1] + m - 1 <= last) return -1;
		last = p[last + 1] + m - 1;
		++ans;
	}

	return ans;
}

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