Submission #1080079

#	Time	Username	Problem	Language	Result	Execution time	Memory
1080079		Trumling	Sorting (IOI15_sorting)	C++14	0 / 100	22 ms	27072 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 S[], int M, int X[], int Y[], int P[], int Q[]) 
	{

		swap(S[0],S[1]);
    	ll pos[N];
        for(int i=0;i<N;i++)
			pos[S[i]]=i;
		
    		
		
    	// for(int i=0;i<N;i++)
		// 	cout<<pos[i]<<' ';

		// 	cout<<'\n';
		vector<pair<ll,ll>>v;
		ll n=N;
		
		if(S[0]!=0)
		{
		v.pb({0,pos[0]});
		swap(S[0],S[pos[0]]);
		swap(S[0],S[1]);
		}

		if(S[0]!=1)
		{
			swap(S[0],S[1]);
			v.pb({0,pos[1]});
			swap(S[0],S[pos[1]]);
		}

    	for(int i=2;i<n;i++)
			for(int j=2;j<n-1;j++)
			{
				if(S[j]>S[j+1])
					{
						v.pb({j,j+1});
						swap(S[j],S[j+1]);
						swap(S[0],S[1]);
					}
			}
		
		if(v.size()%2)
			v.pb({1,1});
			

					
							
					
			
		for(int i=0;i<v.size();i++)
			{
				P[i]=v[i].F;
				Q[i]=v[i].S;
			}
		// for(int i=0;i<N;i++)
		//  	cout<<S[i]<<' ';

     
    	return v.size();
    }

Compilation message (stderr)

sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:62:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   62 |   for(int i=0;i<v.size();i++)
      |               ~^~~~~~~~~
sorting.cpp:5:15: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
    5 |     #define F first
sorting.cpp:64:15: note: in expansion of macro 'F'
   64 |     P[i]=v[i].F;
      |               ^
sorting.cpp:6:15: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
    6 |     #define S second
sorting.cpp:65:15: note: in expansion of macro 'S'
   65 |     Q[i]=v[i].S;
      |               ^
sorting.cpp:71:19: warning: conversion from 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} to 'int' may change value [-Wconversion]
   71 |      return v.size();
      |             ~~~~~~^~
sorting.cpp:12:43: warning: unused parameter 'M' [-Wunused-parameter]
   12 |     int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[])
      |                                       ~~~~^
sorting.cpp:12:50: warning: unused parameter 'X' [-Wunused-parameter]
   12 |     int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[])
      |                                              ~~~~^~~
sorting.cpp:12:59: warning: unused parameter 'Y' [-Wunused-parameter]
   12 |     int findSwapPairs(int N, int S[], 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