Submission #377628

#	Time	Username	Problem	Language	Result	Execution time	Memory
377628		Nordway	Bajka (COCI20_bajka)	C++17	70 / 70	158 ms	2048 KiB

bajka

#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#define x first
#define y second
#define pb push_back
#define mp make_pair
#define all(v) v.begin(),v.end()
#define sz(v) (int)v.size()
#define up_b upper_bound
#define low_b lower_bound
#define nl '\n'

using namespace std;
using namespace __gnu_pbds;

typedef long long ll;
typedef long double ld;

typedef tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update>ordered_set;

const int N=3e2+11;
const int M=1e6+1;
const ll inf=1e9+11;
const ld EPS=1e-6;
const ll INF=1e18;
const ll mod=/*999999001*/1e9+7;
const int dx[4]={1,0,0,-1};
const int dy[4]={0,1,-1,0};

char a[N],b[N];
ll dp[N][N+N];

void solve(){
  int n,m;
  cin>>n>>m;
  for(int i=1;i<=n;i++){
    cin>>a[i];
  }
  for(int i=1;i<=m;i++){
    cin>>b[i];
  }
  for(int i=1;i<=n;i++){
    if(a[i]==b[1])dp[1][i]=0;
    else dp[1][i]=inf;
  }
  for(int i=2;i<=m;i++){
    for(int j=1;j<=n;j++){
      dp[i][j]=inf;
    }
  }
  for(int i=2;i<=m;i++){
    for(int j=1;j<=n;j++){
      if(b[i]==a[j+1]){
        dp[i][j+1]=min(dp[i][j+1],dp[i-1][j]+1);
      }
      if(b[i]==a[j-1]){
        dp[i][j-1]=min(dp[i][j-1],dp[i-1][j]+1);
      }
      for(int len=1;len<=n;len++){
        if(a[j]==a[j+len]){
          if(b[i]==a[j+len+1])dp[i][j+len+1]=min(dp[i][j+len+1],dp[i-1][j]+len+1);
          if(b[i]==a[j+len-1])dp[i][j+len-1]=min(dp[i][j+len-1],dp[i-1][j]+len+1);
        }
        if(j<=len)continue;
        if(a[j]==a[j-len]){
          if(b[i]==a[j-len-1])dp[i][j-len-1]=min(dp[i][j-len-1],dp[i-1][j]+len+1);
          if(b[i]==a[j-len+1])dp[i][j-len+1]=min(dp[i][j-len+1],dp[i-1][j]+len+1);
        }
      }
    }
  }
  int ans=(*min_element(dp[m]+1,dp[m]+n+1));
  if(ans==inf)ans=-1;
  cout<<ans;
}

int main(){
  ios_base::sync_with_stdio(0);
  cin.tie(0),cout.tie(0);
  int T=1;
  //cin>>T;
  for(int i=1;i<=T;i++){
    solve();
    cout<<nl;
  }
  return 0;
}

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