Submission #674940

#	Time	Username	Problem	Language	Result	Execution time	Memory
674940		vjudge1	Bajka (COCI20_bajka)	C++17	20 / 70	1090 ms	468 KiB

bajka

#include <bits/stdc++.h>
using namespace std;
#pragma GCC optimize ("Ofast")
 
#define F first
#define S second
#define vi vector<int>
#define vvi vector<vi>
#define pi pair<int, int>
#define vpi vector<pi>
#define vb vector<bool>
#define vvb vector<vb>
#define pb push_back
#define ppb pop_back
#define read(a) for(auto &x:a) cin >> x;
#define print(a) for(auto x:a) cout << x << " "; cout << "\n";
#define vc vector<char>
#define vvc vector<vc>
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
 
#define int long long
#define ld long double
const int INF = 1e18;
const int inf = 1e9;
 
void solve(){
    int n, m; cin >> n >> m;
    string s, t; cin >> s >> t;

    vi cnt(26, 0);
    for(auto &c:s) cnt[c-'a']++;

    for(auto &c:t)
        if(!cnt[c-'a']){
            cout << "-1\n";
            return;
        }

    vvi adj(n);
    vector<set<char>> neigh(n);
    for(int i=0; i<n; i++)
    for(int j=i+1; j<n; j++)
        if(j-i == 1 || s[i] == s[j]){
            adj[i].pb(j); neigh[i].insert(s[j]);
            adj[j].pb(i); neigh[j].insert(s[i]);
        }

    int ans = INF;
    function<void(int, int, int, bool)> dfs = [&](int v, int len, int ac, bool mov){
        if(mov) len++;
        if(len == t.size()){
            ans = min(ans, ac);
            return;
        }
        for(auto u:adj[v]){
            if(abs(u-v) == 1 && s[u] == t[len]) dfs(u, len, ac+abs(u-v), 1);
            if(mov && s[u] == s[v] && neigh[u].count(t[len])) dfs(u, len, ac+abs(u-v), 0);
        }
    };
    for(int i=0; i<n; i++)
        if(s[i] == t[0]) dfs(i, 0, 0, 1);
    cout << (ans != INF ? ans : -1) << "\n";
}
 
signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
 
    int tt = 1;
    // cin >> tt;
    while(tt--)
        solve();
    return 0;
}

Compilation message (stderr)

bajka.cpp: In lambda function:
bajka.cpp:52:16: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   52 |         if(len == t.size()){
      |            ~~~~^~~~~~~~~~~

• Subtask 1: 20 / 20
• Subtask 2: 0 / 50