Submission #30362

#	Time	Username	Problem	Language	Result	Execution time	Memory
30362		Nikefor	Gondola (IOI14_gondola)	C++98	0 / 100	0 ms	2548 KiB

gondola

#include "gondola.h"
#include <vector>
#include <set>
#include <algorithm>
#include <cstdio>
#define mod 1000000009

using namespace std;
long long us(int x, int y) {
	if(x==0) return 1;
	if(y==0) return 1;
	if(y==1) return x%mod;
	long long a = us(x,y>>1);
	if(y&1) return (a * a * x)%mod;
	return (a*a)%mod;

}
int valid(int n, int inputSeq[])
{
	set<int> used;
	for(int i=0; i<n; i++) {
		if(used.find(inputSeq[i])!= used.end()) return 0;
		used.insert(inputSeq[i]);
	}
	int start = 0;
	for (int i = 0; i < n; ++i) if(inputSeq[i]<=n) {start = i; break; }
	
	if(!start) return 1;
	int pos = start, next = inputSeq[start];
	for(int i=0; i<n; i++) {
		if(inputSeq[pos]<=n) {
			if(inputSeq[pos]!=next) return 0;
		}
		pos++;
		if(pos>=n) pos = 0;
		next++;
		if(next>=n) next = 0;
	}
	return 1;
}


int replacement(int n, int gondolaSeq[], int replacementSeq[])
{
  return -2;
}

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

int countReplacement(int n, int inputSeq[])
{
	//for(int i=0 ; i<20; i++) printf("%d\n",us(2,i) );
	int res = 1, ctr=0;
	if(!valid(n, inputSeq)) return 0;
	bool flag = true;
	vector<int> v;
	for (int i = 0; i < n; ++i) {
		if(inputSeq[i]>n) flag = false;
	 if(i!=n-1 and inputSeq[i+1] != (inputSeq[i]+1) and inputSeq[i+1]!=1) flag = false;
	 if(inputSeq[i]>n) {
	 	ctr++;
	 	v.push_back(inputSeq[i]);
	 }
	}
	sort(v.begin(), v.end());
	if(flag) return 1;
	int last = n+1;
	for(int i= 0; i<v.size(); i++) {
		res*= us(v[i]-last, v.size()-i);;
		last = v[i]+1;
	}
  return res;
}

Compilation message (stderr)

gondola.cpp: In function 'int countReplacement(int, int*)':
gondola.cpp:68:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i= 0; i<v.size(); i++) {
                 ^

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