Submission #346474

#	Time	Username	Problem	Language	Result	Execution time	Memory
346474		Pichon5	Bajka (COCI20_bajka)	C++17	70 / 70	120 ms	768 KiB

bajka

#include<bits/stdc++.h>
#define lcm(a,b) (a/__gcd(a,b))*b
#define fast ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define ll long long int
#define vi vector<int>
#define vll vector<ll>
#define pb push_back
#define F first
#define S second
#define mp make_pair
//salida rapida "\n"
//DECIMALES fixed<<sp(n)<<x<<endl;
//gcd(a,b)= ax + by
//lCB x&-x
//set.erase(it) - ersases the element present at the required index//auto it = s.find(element)
//set.find(element) - iterator pointing to the given element if it is present else return pointer pointing to set.end()
//set.lower_bound(element) - iterator pointing to element greater than or equal to the given element
//set.upper_bound(element) - iterator pointing to element greater than the given element
// | ^
//stoll string to long long
using namespace std;
int n,m;
int dp[305][305];
bool ok=false;
map<char, vi >M;
string ss,s;
//minimo si esto en posicion i y quiero escribir ss[ll]
void init(){
    for(int i=0;i<305;i++){
        for(int l=0;l<305;l++){
            dp[i][l]=-1;
        }
    }
}
int f(int pos, int poss){
    if(poss==m){
        return -1;
    }
    if(ss[poss]!=s[pos]){
        return 1e9;
    }
    if(dp[pos][poss]!=-1){
        return dp[pos][poss];
    }
    dp[pos][poss]=1e9;
    if(pos+1<n){
        dp[pos][poss]=min(dp[pos][poss],f(pos+1,poss+1)+1);
    }
    if(pos-1>=0){
        dp[pos][poss]=min(dp[pos][poss],f(pos-1,poss+1)+1);
    }
    for(auto it : M[s[pos]]){
        if(it==pos)continue;
        if(it+1<n &&  (it+1!=pos)){
            dp[pos][poss]=min(dp[pos][poss],f(it+1,poss+1)+abs(pos-it)+1);
        }
        if(it-1>=0 &&  (it-1!=pos)){
            dp[pos][poss]=min(dp[pos][poss],f(it-1,poss+1)+abs(it-pos)+1);
        }
    }
    return dp[pos][poss];
}
int main()
{
    init();
    cin>>n>>m;
    cin>>s>>ss;
    for(int i=0;i<n;i++){
        M[s[i]].pb(i);
    }
    if(s.size()==1){
        if(s==ss){
            cout<<0<<endl;
        }else{
            cout<<-1<<endl;
        }
        return 0;
    }
    int res=1e9;
    for(auto it : M[ss[0]]){
        //int aux=f(it,0);
        res=min(res,f(it,0));

    }
    if(res==1e9){
        cout<<-1<<endl;
    }else{
        cout<<res<<endl;
    }



    return 0;
}

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