Submission #127725

#	Time	Username	Problem	Language	Result	Execution time	Memory
127725		Dr_Cow	Gondola (IOI14_gondola)	C++14	25 / 100	15 ms	1144 KiB

gondola

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

int valid(int n, int inputSeq[]){
	int ip=-1,N[100010];
	bool tf[250010];
	for (int i=0;i<n;i++)
		if (tf[inputSeq[i]]) return 0;
		else tf[inputSeq[i]]=true;
	for (int i=0;i<n;i++){
		if (inputSeq[i]<=n){
			ip=i;break;
		}
	}
	
	if (ip==-1) return 1;
	else {
		N[ip]=inputSeq[ip];
		for (int i=ip+1;i<n;i++) {
			N[i]=N[i-1]+1;
			if (N[i]>n) N[i]-=n;
		}
		for (int i=ip-1;i>=0;i--){
			N[i]=N[i+1]-1;
			if (N[i]<=0) N[i]+=n;
		}
	}
	for (int i=0;i<n;i++)
		if (inputSeq[i]<=n && inputSeq[i]!=N[i]) 	return 0;
  return 1;

}
//----------------------

int replacement(int n, int gondolaSeq[], int replacementSeq[]){
 	bool tf[250010];
 	int tmp[250010],ip[250010];
 	int len=0,m=0;
 	for (int i =0;i<n;i++){
 		m=(gondolaSeq[i],m);
 		tf[gondolaSeq[i]]=true;
 		ip[gondolaSeq[i]]=i+1;
		}
	
	for (int i=m;i>n;i--){
		int p=i-1;
		tf[i]=false;
		while (tf[p]) p--;
		tf[p]=true;
		tmp[len]=p;
		len++;
	}
 		
 		for (int i=0;i<len;i++){
 			replacementSeq[i]=tmp[len-1-i];
		 }
 		
 
 return len;
}

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

int countReplacement(int n, int inputSeq[])
{
  return 1;
}

Compilation message (stderr)

gondola.cpp: In function 'int replacement(int, int*, int*)':
gondola.cpp:40:19: warning: value computed is not used [-Wunused-value]
    m=(gondolaSeq[i],m);
       ~~~~~~~~~~~~^
gondola.cpp:40:19: warning: left operand of comma operator has no effect [-Wunused-value]
gondola.cpp:37:19: warning: variable 'ip' set but not used [-Wunused-but-set-variable]
   int tmp[250010],ip[250010];
                   ^~
gondola.cpp: In function 'int valid(int, int*)':
gondola.cpp:8:21: warning: 'tf[<unknown>]' may be used uninitialized in this function [-Wmaybe-uninitialized]
   if (tf[inputSeq[i]]) return 0;
       ~~~~~~~~~~~~~~^
gondola.cpp: In function 'int replacement(int, int*, int*)':
gondola.cpp:48:14: warning: array subscript is below array bounds [-Warray-bounds]
   while (tf[p]) p--;
          ~~~~^
gondola.cpp:49:7: warning: array subscript is below array bounds [-Warray-bounds]
   tf[p]=true;
   ~~~~^

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