Submission #572229

#TimeUsernameProblemLanguageResultExecution timeMemory
572229AGEIspit (COCI19_ispit)C++14
63 / 90
885 ms58080 KiB
#include<bits/stdc++.h> #define int long long #define F first #define S second #define pb push_back using namespace std; const int N=1e6,M=2e3,mod=1e16+31,ppp=31; int hashh[505][505],cnt[505][505][27],ans[505][505]; string s[505]; int mult(int x,int y){ return ((x%mod)*(y%mod))%mod; } int minuss(int x,int y){ return ((x%mod)-(y%mod)+mod)%mod; } int summ(int x,int y){ return((x%mod)+(y%mod))%mod; } void compute_hash(string s,int index){ const int pp=31; int p_pow=1; hashh[index][0]=(s[0]-'a')+1; for(int i=1;i<s.size();i++){ p_pow=mult(p_pow,pp); hashh[index][i]=summ(hashh[index][i-1],mult((s[i]-'a')+1,p_pow)); } } pair<int,int> compute_hash2(int start,int num,int anss,int intial){ for(int i=0;i<num;i++){ start=mult(start,ppp); anss=summ(anss,mult(intial,start)); } return {anss,start}; } main() { int n,m; cin>>n>>m; for(int i=0;i<n;i++) cin>>s[i]; for(int i=0;i<n;i++){ for(int j=0;j<n;j++){ for(int k=i;k<min(n,i+m);k++){ cnt[i][j][s[j][k]-'a']++; } } } for(int i=0;i<n;i++){ compute_hash(s[i],i); } for(int i=0;i<n;i++){ for(int k=0;k<n;k++){ int anss=0,start=1; for(int j=0;j<26;j++){ pair<int,int> p; p=compute_hash2(start,cnt[i][k][j],anss,j+1); anss=p.F; start=p.S; } ans[i][k]=anss%mod; } for(int j=0;j<n;j++){ for(int k=j+1;k<n;k++){ if((i==0||hashh[j][i-1]==hashh[k][i-1])&&((i>=n-m)||(hashh[j][n-1]-hashh[j][i+m-1]==hashh[k][n-1]-hashh[k][i+m-1]))&&(ans[i][j]==ans[i][k])){ cout<<"DA"<<endl; exit(0); } } } } cout<<"NE"<<endl; return 0; } /* 4 2 abcd acbd unee asds */

Compilation message (stderr)

ispit.cpp: In function 'void compute_hash(std::string, long long int)':
ispit.cpp:36:18: 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]
   36 |     for(int i=1;i<s.size();i++){
      |                 ~^~~~~~~~~
ispit.cpp: At global scope:
ispit.cpp:55:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   55 | main()
      | ^~~~
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