Submission #1010881

#TimeUsernameProblemLanguageResultExecution timeMemory
1010881MardonbekhazratovGondola (IOI14_gondola)C++17
100 / 100
45 ms5972 KiB
#include "gondola.h" #include<bits/stdc++.h> using namespace std; int valid(int n, int inputSeq[]){ int mn=n,id=-1; map<int,int>cnt; for(int i=0;i<n;i++){ cnt[inputSeq[i]]++; if(inputSeq[i]<=mn){ mn=inputSeq[i]; id=i; } } for(auto [x,y]:cnt){ if(y>1) return 0; } if(mn==n) return 1; id=(id-mn+1+n)%n; for(int i=0;i<n;i++){ if(inputSeq[(id+i)%n]==i+1 || inputSeq[(id+i)%n]>n) continue; return 0; } return 1; } //---------------------- int replacement(int n, int gondolaSeq[], int replacementSeq[]){ const int N=2.5e5; vector<int>cnt(N+1,0); int mn=N,id=0,mx=0; set<int>s; set<pair<int,int>>t; for(int i=0;i<n;i++){ cnt[gondolaSeq[i]]++; if(gondolaSeq[i]<mn){ mn=gondolaSeq[i]; id=i; } mx=max(mx,gondolaSeq[i]); if(gondolaSeq[i]<=n) s.insert(gondolaSeq[i]); else t.insert({gondolaSeq[i],i}); } if(mn<=n){ id=(id-mn+1+n)%n; } int ans=0,last=n+1; for(auto [x,y]:t){ int k=(y-id+n)%n; replacementSeq[ans++]=k+1; for(int j=last;j<x;j++) replacementSeq[ans++]=j; last=x+1; } return ans; } //---------------------- const int MOD=1e9+9; long long binpow(int a,int b){ if(b==0) return 1; if(b==1) return a; long long x=binpow(a,b/2); if(b&1){ return a*x%MOD*x%MOD; } return x*x%MOD; } int countReplacement(int n, int inputSeq[]){ if(!valid(n,inputSeq)){ return 0; } int c=0; vector<int>f={n}; for(int i=0;i<n;i++){ if(inputSeq[i]>n) f.push_back(inputSeq[i]),c++; } sort(f.begin(),f.end()); long long ans=1; if(c==n) ans=n; for(int i=1;i<f.size();i++){ ans=ans*binpow(c,f[i]-f[i-1]-1)%MOD; c--; } return ans; }

Compilation message (stderr)

gondola.cpp: In function 'int countReplacement(int, int*)':
gondola.cpp:87:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   87 |     for(int i=1;i<f.size();i++){
      |                 ~^~~~~~~~~
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