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Submission #838394

# Submission time Handle Problem Language Result Execution time Memory
838394 2023-08-26T18:54:57 Z MohamedAhmed04 Gondola (IOI14_gondola) C++14
60 / 100
 25 ms 5328 KB 
#include <bits/stdc++.h>
#include "gondola.h"

using namespace std ;

const int MAX = 3e5 + 10 ;

int arr[MAX] ;

int valid(int n, int inputSeq[])
{
	for(int i = 0 ; i < 2*n ; ++i)
		arr[i] = inputSeq[i%n] ;
	set<int>s ;
	for(int i = 0 ; i < n ; ++i)
		s.insert(arr[i]) ;
	if(s.size() != n)
		return 0 ;
	int idx = -1 ;
	for(int i = 0 ; i < n ; ++i)
	{
		if(arr[i] <= n)
			idx = i ;
	}
	if(idx == -1)
		return 1 ;
	int now = arr[idx]-1 ;
	for(int i = idx ; i < idx+n ; ++i)
	{
		++now ;
		if(now == n+1)
			now = 1 ;
		if(arr[i] != now && arr[i] <= n)
			return 0 ;
	}
	return 1 ;
}

//----------------------

int mark[MAX] ;

int replacement(int n, int gondolaSeq[], int replacementSeq[])
{
	for(int i = 0 ; i < 2*n ; ++i)
		arr[i] = gondolaSeq[i%n] ;
	int idx = -1 ;
	for(int i = 0 ; i < n ; ++i)
	{
		if(arr[i] <= n)
			idx = i ;
	}
	int Max = *max_element(arr , arr + n) ;
	for(int i = 0 ; i < n ; ++i)
		mark[arr[i]] = 1 ;
	vector< pair<int , int> >vp ;
	if(idx == -1)
	{
		for(int i = 0 ; i < n ; ++i)
			vp.emplace_back(arr[i] , i+1) ;
	}
	else
	{
		int now = arr[idx] - 1 ;
		for(int i = idx ; i < idx+n ; ++i)
		{
			++now ;
			if(now == n+1)
				now = 1 ;
			if(arr[i] > n)
				vp.emplace_back(arr[i] , now) ;
		}
	}
	sort(vp.begin() , vp.end()) ;
	idx = 0 ;
	int prv = n ;
	for(auto &p : vp)
	{
		replacementSeq[idx] = p.second , ++idx ;
		for(int i = prv+1 ; i < p.first ; ++i)
			replacementSeq[idx] = i , ++idx ;
		prv = p.first ;
	}
	return idx ;
}

//----------------------

const int mod = 1e9 + 9 ;

int Add(int x , int y)
{
	int z = x + y ;
	if(z >= mod)
		z -= mod ;
	return z ;
}

int Sub(int x , int y)
{
	int z = x - y ;
	if(z < 0)
		z += mod ;
	return z ;
}

int Mul(int x , int y)
{
	return (1ll * x * y) % mod ;
}

int powlog(int base , int power)
{
	if(power == 0)
		return 1 ;
	int x = powlog(base , power / 2) ;
	x = Mul(x , x) ;
	if(power & 1)
		x = Mul(x , base) ;
	return x ;
}

int countReplacement(int n, int inputSeq[])
{
	if(!valid(n , inputSeq))
		return 0 ;
	for(int i = 0 ; i < 2*n ; ++i)
		arr[i] = inputSeq[i%n] ;
	int Max = *max_element(arr , arr + n) ;
	int cnt = 0 ;
	for(int i = 0 ; i < n ; ++i)
		cnt += (arr[i] > n) ;
	int ans = powlog(cnt , Max - n - cnt) ;
	if(cnt == n)
		ans = Mul(ans , n) ;
	return ans ;
}

Compilation message

gondola.cpp: In function 'int valid(int, int*)':
gondola.cpp:17:14: warning: comparison of integer expressions of different signedness: 'std::set<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   17 |  if(s.size() != n)
      |     ~~~~~~~~~^~~~
gondola.cpp: In function 'int replacement(int, int*, int*)':
gondola.cpp:53:6: warning: unused variable 'Max' [-Wunused-variable]
   53 |  int Max = *max_element(arr , arr + n) ;
      |      ^~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 9 ms 2516 KB Output is correct
7 Correct 21 ms 4336 KB Output is correct
8 Correct 16 ms 4436 KB Output is correct
9 Correct 5 ms 1620 KB Output is correct
10 Correct 20 ms 5136 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 8 ms 2516 KB Output is correct
7 Correct 21 ms 4308 KB Output is correct
8 Correct 16 ms 4488 KB Output is correct
9 Correct 6 ms 1652 KB Output is correct
10 Correct 20 ms 5120 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 10 ms 2256 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 25 ms 5328 KB Output is correct

Subtask #4
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct

Subtask #6
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 7 ms 1492 KB Output is correct
12 Correct 8 ms 1620 KB Output is correct
13 Correct 12 ms 1944 KB Output is correct
14 Correct 10 ms 1440 KB Output is correct
15 Correct 16 ms 2848 KB Output is correct

Subtask #7
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct

Subtask #8
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Incorrect 0 ms 212 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #9
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 312 KB Output is correct
5 Incorrect 0 ms 308 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Incorrect 1 ms 212 KB Output isn't correct
6 Halted 0 ms 0 KB -