Submission #1081603

#	Time	Username	Problem	Language	Result	Execution time	Memory
1081603		Trumling	Sorting (IOI15_sorting)	C++11	0 / 100	1 ms	348 KiB

sorting

#include "sorting.h"
#include<bits/stdc++.h>
using namespace std;
     
#define F first
#define S second
#define pb push_back
#define all(x) x.begin(),x.end()
#define INF 9999999999999999
typedef long long ll;
 
 
 
int findSwapPairs(int N, int ar[], int M, int X[], int Y[], int P[], int Q[]) 
{ 
 
    int pos[N];
	int arr[N];
    for(int i=0;i<N;i++)
    {
	  arr[i]=ar[i];
      pos[arr[i]]=i;
    }
        
 
 	vector<pair<int,int>>v;
    for(int i=0;i<N;i++)
    {
      if(pos[i]==i)
        v.pb({0,0});
      else
     	v.pb({pos[i],i});
        swap(arr[pos[i]],arr[i]);
        pos[arr[pos[i]]]=pos[i];
        pos[i]=i;
 
    }
    
 
 for(int i=0;i<N;i++)
   arr[i]=ar[i];
  
 for(int i=0;i<v.size();i++)
             {
               P[i]=v[i].F;
               Q[i]=v[i].S;
   			   swap(arr[v[i].F],arr[v[i].S]);
             }
 assert(is_sorted(arr,arr+N));	
  
    return v.size();
        
}

Compilation message (stderr)

sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:31:7: warning: this 'else' clause does not guard... [-Wmisleading-indentation]
   31 |       else
      |       ^~~~
sorting.cpp:33:9: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'else'
   33 |         swap(arr[pos[i]],arr[i]);
      |         ^~~~
sorting.cpp:43:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |  for(int i=0;i<v.size();i++)
      |              ~^~~~~~~~~
sorting.cpp:51:18: warning: conversion from 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} to 'int' may change value [-Wconversion]
   51 |     return v.size();
      |            ~~~~~~^~
sorting.cpp:14:40: warning: unused parameter 'M' [-Wunused-parameter]
   14 | int findSwapPairs(int N, int ar[], int M, int X[], int Y[], int P[], int Q[])
      |                                    ~~~~^
sorting.cpp:14:47: warning: unused parameter 'X' [-Wunused-parameter]
   14 | int findSwapPairs(int N, int ar[], int M, int X[], int Y[], int P[], int Q[])
      |                                           ~~~~^~~
sorting.cpp:14:56: warning: unused parameter 'Y' [-Wunused-parameter]
   14 | int findSwapPairs(int N, int ar[], int M, int X[], int Y[], int P[], int Q[])
      |                                                    ~~~~^~~

• Subtask 1: 0 / 8
• Subtask 2: 0 / 12
• Subtask 3: 0 / 16
• Subtask 4: 0 / 18
• Subtask 5: 0 / 20
• Subtask 6: 0 / 26