Submission #1100886

#	Time	Username	Problem	Language	Result	Execution time	Memory
1100886		huantran	Selotejp (COCI20_selotejp)	C++17	110 / 110	23 ms	604 KiB

Main

#include <iostream>
#include <algorithm>
#include <cstring>
#include <string.h>
#include <vector>
#include <math.h>
#include <map>
#include <set>
#include <queue>
#include <iomanip>
#include <numeric>
#include <random>
#include <chrono>
#include <fstream>
#include <stack>
#include <cmath>
#define bit(x, i) (((x) >> (i)) & 1LL)
#define rand rd
#define PI acos(-1)

using namespace std;
typedef long long int ll;
const int maxn = 1e5 + 5;
const ll mod = 998244353;
const int inf = 1e9 + 7;
const ll base = 1e5 + 7;
using pll = pair<ll, ll>;

const string NAME = "LOCO";
const int NTEST = 100;

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

ll Rand(ll l, ll r) {
    return l + rd() % (r - l + 1);
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);

    int n, m;   
    cin >> n >> m;

    vector<int> dp(1 << m, inf), ans(1 << m);
    vector<vector<char>> adj(n, vector<char>(m));

    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++)
            cin >> adj[i][j];
    }

    dp[0] = 0;
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            for (int mask = 0; mask < (1 << m); mask++) {
                if (bit(mask, j) == 0) {
                    ans[mask] = min(dp[mask], dp[mask ^ (1 << j)]);
                    if ((j == 0 || (bit(mask, j - 1) == 1) || adj[i][j - 1] == '.') && adj[i][j] == '#')
                        ans[mask]++;
                }
                else {
                    if(adj[i][j] == '.') 
                        ans[mask] = inf;
					else 
                        ans[mask] = min(dp[mask], dp[mask ^ (1 << j)] + 1);
                }
                // cout << mask << ' ' << dp[mask] << '\n';
            }
            dp = ans;
            // cout << "Check: " << j << ' ' << *min_element(dp.begin(), dp.end()) << ' ' << dp[0] << dp[1] << dp[2] << dp[3] << '\n';
        }
        // cout << "Check: " << *min_element(dp.begin(), dp.end()) << '\n';
    }

    int res = inf;
    for (int i = 0; i < (1 << m); i++) 
        res = min(res, dp[i]);

    cout << res;
}

• Subtask 1: 35 / 35
• Subtask 2: 35 / 35
• Subtask 3: 40 / 40