Submission #545362

#TimeUsernameProblemLanguageResultExecution timeMemory
545362leakedCopy and Paste 3 (JOI22_copypaste3)C++14
57 / 100
889 ms53592 KiB
#include <bits/stdc++.h> #define f first #define s second #define m_p make_pair #define all(x) (x).begin(),(x).end() #define rall(x) (x).rbegin(),(x).rend() #define vec vector #define pb push_back #define sz(x) (int)(x).size() #define pw(x) (1LL<<(x)) #define fast_resp ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0); using namespace std; typedef long long ll; typedef pair<int,int> pii; typedef long double ld; typedef pair<int,ll> pil; template<class T> bool umin(T &a,const T &b){return (a>b?a=b,1:0);} template<class T> bool umax(T &a,const T &b){return (a<b?a=b,1:0);} const ll inf=1e18; const int N=1e3+3; ll dp[2][N][N]; ///l,r,prefix //int pref[N][N]; vec<int> zet[N]; vec<int> z_func(string s){ int l=0,r=-1; vec<int> zt(sz(s),0); for(int i=1;i<sz(s);i++){ zt[i]=(i>r?0:min(r-i+1,zt[i-l])); while(i+zt[i]<sz(s) && s[i+zt[i]]==s[zt[i]]) ++zt[i]; if(i+zt[i]-1>r){ r=i+zt[i]-1; l=i; } } return zt; } signed main(){ fast_resp; int n; string s; cin>>n>>s; int a,b,c; cin>>a>>b>>c; for(int t=0;t<2;t++){ for(int j=0;j<N;j++){ for(int k=0;k<N;k++) dp[t][j][k]=inf; } } for(int i=0;i<n;i++){ zet[i]=z_func(s.substr(i,n-i)+'#'+s.substr(i,n-i)); // for(int j=i;j<n;j++){ // cout<<s.substr(i,n-i)<<' '<<s.substr(j,n-j)<<' '<<zet[i][j-i+n-i+1]<<'\n'; // } // for(int j=i+1;j<n;j++){ // int jt=pref[i][j-1]; // while(jt && s[j]!=s[jt+i]) jt=pref[i][jt-1]; // pref[i][j]=jt+(s[jt+i]==s[j]); // } } for(int l=n-1;l>=0;l--){ int nl=(l%2)^1; for(int r=max(l-1,0);r<n;r++){ for(int k=0;k<=r-l+2;k++) dp[nl][r][k]=inf; } int lt=l%2; for(int r=l;r<n;r++){ if(l==r) dp[lt][r][0]=a; for(int k=0;k<=r-l+1;k++){ // cout<<"HEY "<<r-k+2+n-l<<' '<<sz(zet[l])<<endl; if(r-k+1>=l+k && zet[l][r-k+2+n-l-l]>=k){ // assert((r-k+2+n-l)<sz(zet[l])); // if(zet[l][r-k+2+n-l-l]>=k){ // assert((r-k+2+n-l)<sz(zet[l])); umin(dp[lt][r][k],dp[lt][r-k][k]+c); // } } umin(dp[lt][r][r-l+1],dp[lt][r][k]+b+c); if(l) umin(dp[nl][r][0],dp[lt][r][k]+a); if(r+1<n) umin(dp[lt][r+1][k],dp[lt][r][k]+a); umin(dp[lt][r][0],dp[lt][r][k]); } } } // cout<<dp[2][4][3]<<endl; ll ans=inf; for(int i=0;i<=n;i++) umin(ans,dp[0][n-1][i]); cout<<ans; return 0; } /* */
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