Submission #333876

#	Time	Username	Problem	Language	Result	Execution time	Memory
333876		wiwiho	Bajka (COCI20_bajka)	C++14	70 / 70	25 ms	1024 KiB

bajka

#include <bits/stdc++.h>

#define pii pair<int, int>
#define mp make_pair
#define F first
#define S second
#define iter(a) a.begin(), a.end()

using namespace std;

typedef long long ll;

const ll MAX = 2147483647;

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

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

    string a, b;
    cin >> a >> b;
    vector<vector<ll>> dp(m, vector<ll>(n, MAX));
    for(int i = 0; i < n; i++){
        if(a[i] == b[0]) dp[0][i] = 0;
    }

    for(int i = 0; i < m - 1; i++){
        for(int j = 0; j < n; j++){
            if(dp[i][j] == MAX) continue;
            for(int k = 0; k < n; k++){
                if(a[k] == b[i]) dp[i][k] = min(dp[i][k], dp[i][j] + abs(j - k));
            }
        }
        for(int j = 0; j < n; j++){
            if(dp[i][j] == MAX) continue;
            if(j && a[j - 1] == b[i + 1]) dp[i + 1][j - 1] = min(dp[i + 1][j - 1], dp[i][j] + 1);
            if(j < n - 1 && a[j + 1] == b[i + 1]) dp[i + 1][j + 1] = min(dp[i + 1][j + 1], dp[i][j] + 1);
        }
    }

    int ans = *min_element(iter(dp[m - 1]));
    if(ans == MAX) ans = -1;
    cout << ans << "\n";

    return 0;
}

• Subtask 1: 20 / 20
• Subtask 2: 50 / 50