Submission #939124

#TimeUsernameProblemLanguageResultExecution timeMemory
939124vjudge1Palindromic Partitions (CEOI17_palindromic)C++17
100 / 100
271 ms19012 KiB
#include <bits/stdc++.h> using namespace std; #define int long long #define pb push_back #define fr first #define sc second const long long INF=1e17,N=1e6+6,mod=1e9+7; int p=31; int h[N],hsh[N]; int hesh(int l, int r){ return (((hsh[r]-hsh[l-1]+mod)%mod)*h[N-r])%mod; } deque<int> c[29]; void solve(){ string s;cin>>s;int n=s.size(); h[0]=1; for(int i=1;i<N;i++){ h[i]=(h[i-1]*p)%mod; } for(int i=1;i<=(int)s.size();i++){ hsh[i]=(hsh[i-1]+((s[i-1]-'a'+1)*h[i-1])%mod)%mod; } int ans=0; for(int i=0;i<(n)/2;i++){ int j=i; int l=n-i-1; bool ok=0; for(;j<(n)/2;j++,l--){ //cout<<i<<' '<<j<<':'<<l<<' '<<n-i-1<<endl; //cout<<hesh(i+1,j+1)<<' '<<hesh(l+1,n-i)<<endl; // if(hesh(i+1,j+1)==(hesh(l+1,n-i))){ ok=1; ans+=2; if(n%2==0 && j==n/2-1) ans--; break; } //if(j==n/2) ans++; } //if(!ok) ans++; i=j; } cout<<ans+1<<endl; } main(){ int T=1; cin>>T; while(T--){ solve(); } } /* 11 7958 4722 9704 6995 1052 5269 7479 8238 6423 7918 866 7659 2498 8486 1196 7462 6633 2158 2022 1146 8392 3037 */

Compilation message (stderr)

palindromic.cpp: In function 'void solve()':
palindromic.cpp:27:8: warning: variable 'ok' set but not used [-Wunused-but-set-variable]
   27 |   bool ok=0;
      |        ^~
palindromic.cpp: At global scope:
palindromic.cpp:46:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   46 | main(){
      | ^~~~
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