Submission #880997

#	Time	Username	Problem	Language	Result	Execution time	Memory
880997		TAhmed33	Bajka (COCI20_bajka)	C++98	70 / 70	182 ms	6812 KiB

bajka

#include <bits/stdc++.h>
using namespace std;
vector <pair <int, int>> adj[301];
const int inf = 2e5 + 25;
int dist[301][301];
int n, m; string s, t;
int main () {
    cin >> n >> m >> s >> t;
    for (int i = 0; i < n; i++) {
        for (int j = i + 1; j < n; j++) {
            if (s[i] == s[j]) {
                adj[i].push_back({j, j - i});
                adj[j].push_back({i, j - i});
            }
        }
    }
    for (int i = 1; i < n; i++) {
        adj[i - 1].push_back({i, 1});
        adj[i].push_back({i - 1, 1});
    }
    for (int i = 0; i + 1 < n; i++) {
        adj[i + 1].push_back({i, 1});
        adj[i].push_back({i + 1, 1});
    }
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            dist[i][j] = inf;
        }
    }
    priority_queue <vector <int>, vector <vector <int>>, greater <vector <int>>> pq;
    for (int i = 0; i < n; i++) {
        if (s[i] == t[0]) {
            dist[i][0] = 0;
            pq.push({0, i, 0});
        }
    }
    int mn = inf;
    while (!pq.empty()) {
        auto k = pq.top();
        pq.pop();
        if (k[0] > dist[k[1]][k[2]]) continue; 
        if (k[2] == m - 1) {
            mn = min(mn, k[0]);
            continue;
        }
        for (auto [node, val] : adj[k[1]]) {
            if (s[node] == s[k[1]]) {
                if (k[0] + val < dist[node][k[2]]) {
                    dist[node][k[2]] = k[0] + val;
                    pq.push({k[0] + val, node, k[2]});
                }
            }
            if (s[node] == t[k[2] + 1] && abs(node - k[1]) == 1) {
                if (k[0] + val < dist[node][k[2] + 1]) {
                    dist[node][k[2] + 1] = k[0] + val;
                    pq.push({k[0] + val, node, k[2] + 1});
                }
            }
        }
    }
    if (mn >= inf) {
        cout << "-1\n";
    } else {
        cout << mn << '\n';
    }
}

Compilation message (stderr)

bajka.cpp: In function 'int main()':
bajka.cpp:46:19: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   46 |         for (auto [node, val] : adj[k[1]]) {
      |                   ^

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