Submission #31171

#	Time	Username	Problem	Language	Result	Execution time	Memory
31171		cscandkswon	Gondola (IOI14_gondola)	C++14	100 / 100	36 ms	4952 KiB

gondola

#include "gondola.h"
#include <bits/stdc++.h>
using namespace std;
const int MAXN=100000;
const long long MOD=1000000009;   

int init[MAXN];
     
void settinginit(int n, int seq[]){
 	int i, x=-1;
   	for(i=0; i<n; i++)if(seq[i]<=n){
   		x=(i-seq[i]+1+n)%n;
   		break;
   	}
   	if(x==-1) x=0;
   	for(i=0; i<n; i++, x=(x+1)%n) init[x]=i+1;
}
     
int valid(int n, int inputSeq[]){
    int i;
   	settinginit(n, inputSeq);
   	for(i=0; i<n; i++) if(inputSeq[i]<=n&&inputSeq[i]!=init[i]) return 0;
	sort(inputSeq, inputSeq+n);
    for(i=1; i<n; i++) if(inputSeq[i-1]==inputSeq[i]) return 0;
    return 1;
}
     
pair<int, int> rep[MAXN];
     
int replacement(int n, int gondolaSeq[], int replacementSeq[]){
  	int i, length=0, change=0, last=n+1;
   	settinginit(n, gondolaSeq);
   	for(i=0; i<n; i++) if(gondolaSeq[i]!=init[i])
   		rep[change].first=gondolaSeq[i], rep[change++].second=i;
   	sort(rep, rep+change);
   	for(i=0; i<change; i++){	
   		replacementSeq[length++]=init[rep[i].second];
   		for(; last<rep[i].first; last++) replacementSeq[length++]=last;
   		last=rep[i].first+1;
   	}
   	return length;
}
     
int plc[MAXN], st[50];

int getpow(int a, int b){
	int i, ans=1;
	st[0]=a;
	for(i=1; (1<<i)<=b; i++) st[i]=(long long)st[i-1]*st[i-1]%MOD;
	for(i=0; (1<<i)<=b; i++){
		if((1<<i)&b){
			ans=(long long)ans*st[i]%MOD;
		}
	}
	return ans;
}

int countReplacement(int n, int inputSeq[]){
	long long count=1;
	int i, change=0, last=n+1, o=1;
	if(valid(n, inputSeq)==0) return 0;
	if(inputSeq[0]>n) o=n;
	for(i=0; i<n; i++) if(inputSeq[i]>=n)
		plc[change++]=inputSeq[i];
	sort(plc, plc+change);
	for(i=0; i<change; i++){
		count=count*getpow((change-i), (plc[i]-last))%MOD;
		last=plc[i]+1;
	}
	return count*o%MOD;
}

• 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