Submission #86973

#	Time	Username	Problem	Language	Result	Execution time	Memory
86973		antimirage	Gondola (IOI14_gondola)	C++17	80 / 100	1075 ms	2616 KiB

gondola

#include "gondola.h"
#include <bits/stdc++.h>

#define fr first
#define sc second
#define pb push_back
#define mk make_pair
#define all(s) s.begin(), s.end()

using namespace std;

const int N = 3e5 + 5, mod = 1e9 + 9;

int u[N], sz, mx, pos, ind[N], ar[N], n, fl;

deque <pair <int, int> > vec;

int valid(int N, int x[])
{
	n = N;
	for (int i = 0; i < n; i++)
	{
		if (x[i] > n) continue;
		u[x[i]] = i + 1;
	}
	for (int i = 1; i < n; i++)	
	{
		if ( u[i] != 0 && u[i + 1] != 0 && ((u[i] - 1) + 1) % n != u[i + 1] - 1)
			return 0;
	}
	if ( u[n] != 0 && u[1] != 0 && ((u[n] - 1) + 1) % n != u[1] - 1)
		return 0;
		
	return 1;
}	
int replacement(int n, int a[], int ans[])
{
	for (int i = 0; i < n; i++)
		mx = max(a[i], mx);
		
	for (int i = 0; i < n; i++)
	{
		if(a[i] > n)
			vec.pb( mk(a[i], i) );
		else
			pos = (i - (a[i] - 1) + n) % n;
	}
	sort( all(vec) );
	ind[pos] = ++sz;
	
	for (int i = (pos + 1) % n; i != pos; i = (i + 1) % n)
		ind[i] = ++sz;
	
	sz = 0;
	for (int i = n + 1; i <= mx; i++)
	{
		ans[sz++] = ind[ vec[0].second ];
		ind[ vec[0].second ] = i;
		if ( vec[0].first == i )
			vec.pop_front();
	}
	return sz;
}	
int countReplacement(int n, int a[])
{
	long long ans = 1;
	if (valid(n, a) == 0)
		return 0;
		
	for (int i = 0; i < n; i++)
		mx = max(a[i], mx);
		
	for (int i = 0; i < n; i++)
	{
		if(a[i] > n)
			vec.pb( mk(a[i], i) );
		else
			pos = (i - (a[i] - 1) + n) % n, fl = 1;
	}
	sort( all(vec) );
	
	sz = 0;
	for (int i = n + 1; i <= mx; i++)
	{
		if ( vec[0].first == i )
			vec.pop_front();
		else
			ans *= (int)vec.size(),
			ans %= mod;
	}
	if (!fl)
		ans *= n, ans %= mod;
	return ans;
}
/**
4
3
3 1 4
**/

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 0 / 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