Submission #155071

#	Time	Username	Problem	Language	Result	Execution time	Memory
155071		junodeveloper	Gondola (IOI14_gondola)	C++14	100 / 100	88 ms	6008 KiB

gondola

#include "gondola.h"
#include <bits/stdc++.h>
#define all(x) (x).begin(),(x).end()
#define sz(x) (int)x.size()
#define fi first
#define se second
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
const int mod=1e9+9;

int valid(int n, int inputSeq[]) {
	int i;
	set<int> chk;
	for(i=0;i<n;i++) {
		if(chk.count(inputSeq[i])) return 0;
		chk.insert(inputSeq[i]);
	}
	int p=-1,t;
	for(i=0;i<n;i++) {
		if(inputSeq[i]<=n) {
			t=(i-inputSeq[i]+1+n)%n;
			if(p!=-1&&t!=p) return 0;
			p=t;
		}
	}
	return 1;
}

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

int replacement(int n, int gondolaSeq[], int replacementSeq[]) {
	int i,j,p=0;
	for(i=0;i<n;i++) {
		if(gondolaSeq[i]<=n) {
			p=(i-gondolaSeq[i]+1+n)%n;
			break;
		}
	}
	vector<pii> v;
	for(i=0;i<n;i++) {
		if(gondolaSeq[i]>n) {
			v.push_back(make_pair(gondolaSeq[i],i));
		}
	}
	sort(all(v));
	int cur=n,top=0;
	for(i=0;i<sz(v);i++) {
		if(v[i].se>=p) j=v[i].se-p+1;
		else j=n-p+v[i].se+1;
		replacementSeq[top++]=j;cur++;
		while(cur<v[i].fi) replacementSeq[top++]=cur++;
	}
	return top;
}

//----------------------
int modpow(int a,int n) {
	int r=1,b=a;
	while(n>0) {
		if(n&1) r=(ll)r*b%mod;
		b=(ll)b*b%mod;
		n>>=1;
	}
	return r;
}
int countReplacement(int n, int inputSeq[]) {
	if(!valid(n,inputSeq)) return 0;
	vector<int> v;
	int i;
	for(i=0;i<n;i++) {
		if(inputSeq[i]>n) v.push_back(inputSeq[i]);
	}
	if(v.empty()) return 1;
	v.push_back(n);
	sort(all(v));
	int res=1;
	for(i=0;i+1<sz(v);i++) {
		res=(ll)res*modpow(sz(v)-i-1,v[i+1]-v[i]-1)%mod;
	}
	if(sz(v)==n+1) {
		res=(ll)res*n%mod;
	}
	return res;
}

• 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: 10 / 10