Submission #770112

#	Time	Username	Problem	Language	Result	Execution time	Memory
770112		tigar	Gondola (IOI14_gondola)	C++14	90 / 100	1087 ms	9968 KiB

gondola

#include "gondola.h"
#include <bits/stdc++.h>
//💖
using namespace std;
typedef long long ll;

ll MOD=1000000009;
map<int, bool>check;
map<int, int>convent;
vector<int>ord;

int valid(int n, int* inputSeq)
{
    int last=-1, pos=-1;
    for(int i=0; i<n; i++)
    {
        if(inputSeq[i]<=n and last==-1){last=inputSeq[i]; pos=i;}
        else if(inputSeq[i]<=n)
        {
            if((last+i-pos)%n==(inputSeq[i])%n){last=inputSeq[i]; pos=i;}
            else {return 0;}
        }
        else if(check[inputSeq[i]])return 0;
        check[inputSeq[i]]=true;
    }
    return 1;
}

int replacement(int n, int* gondolaSeq, int* replacementSeq)
{
    int maks=-1, g=-1, k=1;
    for(int i=0; i<n; i++)
    {
        //cout<<gondolaSeq[i]<<" "<<n<<endl;
        if(gondolaSeq[i]>n)
        {
            convent[gondolaSeq[i]]=i+1;
            if(gondolaSeq[i]>maks){maks=gondolaSeq[i]; g=i;}
        }
        else {k=i;}
    }
    for(int i=0; i<n; i++)
    {
        gondolaSeq[i]=(gondolaSeq[k]+i-k+n)%n;
        if(gondolaSeq[i]==0)gondolaSeq[i]=n;
    }
    if (maks==-1)return 0;
    for(int i=n+1; i<=maks; i++)
    {
        if(convent[i]==0){replacementSeq[i-n-1]=gondolaSeq[g]; gondolaSeq[g]=i;}
        else{replacementSeq[i-n-1]=gondolaSeq[convent[i]-1]; gondolaSeq[convent[i]-1]=i;}
    }
	return maks-n;
}

int countReplacement(int n, int* inputSeq)
{
    int last=-1, pos=-1;
    for(int i=0; i<n; i++)
    {
        if(inputSeq[i]<=n and last==-1){last=inputSeq[i]; pos=i;}
        else if(inputSeq[i]<=n)
        {
            if((last+i-pos)%n==(inputSeq[i])%n){last=inputSeq[i]; pos=i;}
            else {return 0;}
        }
        else if(check[inputSeq[i]])return 0;
        check[inputSeq[i]]=true;
    }

    int cnt=0;
    ll maks=0;
    for(int i=0; i<n; i++)
    {
        if(inputSeq[i]>n)
        {
            cnt++; ord.push_back(inputSeq[i]);
            if(inputSeq[i]>maks){maks=inputSeq[i];}
        }
    }

    sort(ord.begin(), ord.end());
    ll res=1, pp=0;

    for(int i=n+1; i<=maks; i++)
    {
        if(i==ord[pp])pp++;
        else
        {
            res=(res*(ord.size()-pp))%MOD;
        }
    }
    if(pp==n)res=(res*n)%MOD;

	return res;
}

/*int main()
{
    int n; cin>>n;
    int gondole[n];
    for(int i=0; i<n; i++)cin>>gondole[i];
    cout<<countReplacement(n, gondole)<<endl;
    //for(int i=0; i<11; i++)cout<<zamena[i]<<" ";
}*/

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 10 / 10
• Subtask 4: 5 / 5
• Subtask 5: 10 / 10
• Subtask 6: 20 / 20
• Subtask 7: 5 / 5
• Subtask 8: 15 / 15
• Subtask 9: 15 / 15
• Subtask 10: 0 / 10