Submission #1227844

#	Time	Username	Problem	Language	Result	Execution time	Memory
1227844		PlayVoltz	Gondola (IOI14_gondola)	C++20	60 / 100	23 ms	4936 KiB

gondola

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

#define pii pair<int, int>
#define mp make_pair
#define pb push_back
#define fi first
#define se second

const int MOD = 1000000009;

int ooga[100005];

int expo(int a, int b){
	int res=1;
	for (;b;b>>=1, a=(a*a)%MOD)if (b&1)res=(res*a)%MOD;
	return res;
}

void init(int n, int vect[]){
	int a=0;
	for (int i=0; i<n; ++i)if (vect[i]<=n){
		a=(vect[i]-1-i+n)%n;
		break;
	}
	for (int i=0; i<n; ++i)ooga[(i+a)%n]=vect[i];
	for (int i=0; i<n; ++i)vect[i]=ooga[i];
}

int valid(int n, int vect[]){
	set<int> s;
	for (int i=0; i<n; ++i)s.insert(vect[i]);
	if (s.size()!=n)return 0;
	init(n, vect);
	for (int i=0; i<n; ++i)if (vect[i]<=n&&vect[i]-1!=i)return 0;
	return 1;
}

int replacement(int n, int vect[], int ans[]){
	init(n, vect);
	int len=0;
	vector<pii> temp;
	for (int i=0; i<n; ++i)if (vect[i]>n)temp.pb(mp(vect[i], i));
	sort(temp.begin(), temp.end());
	for (int i=0, c=n; i<temp.size(); ++i){
		++c, ans[len]=temp[i].se+1, ++len;
		for (;c<temp[i].fi;++c)ans[len]=c, ++len;
	}
	return len;
}

int countReplacement(int n, int vect[]){
	init(n, vect);
	if (!valid(n, vect))return 0;
	vector<int> temp;
	for (int i=0; i<n; ++i)if (vect[i]>n)temp.pb(vect[i]);
	sort(temp.begin(), temp.end());
	int ans=(temp.size()==n?n:1);
	for (int i=0, p=n+1; i<temp.size(); ++i)ans=(ans*expo(temp.size()-i, temp[i]-p))%MOD, p=temp[i]+1;
	return ans;
}

• 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: 0 / 15
• Subtask 9: 0 / 15
• Subtask 10: 0 / 10