Submission #143087

#	Time	Username	Problem	Language	Result	Execution time	Memory
143087		daniel920712	Arranging Shoes (IOI19_shoes)	C++14	15 / 100	31 ms	2012 KiB

shoes

#include <iostream>
#include <stdio.h>
#include <vector>

using namespace std;
long long count_swaps(std::vector<int> S)
{
    long long ans=0,N=S.size(),i,j,k;
    int t;
    /*for(i=0;i<N/2;i++)
    {
        for(j=2*i;j<N;j++)
        {
            if(S[j]<0)
            {
                ans+=(j-2*i);
                t=0-S[j];
                for(k=j;k>2*i;k--) swap(S[k],S[k-1]);
                break;
            }
        }
        for(j=2*i+1;j<N;j++)
        {
            if(S[j]==t)
            {
                ans+=(j-2*i-1);
                t=0-S[j];
                for(k=j;k>2*i+1;k--) swap(S[k],S[k-1]);
                break;
            }
        }

    }*/
    ans=(N/2)*(N/2-1)/2;
    return ans;
}

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:8:32: warning: unused variable 'i' [-Wunused-variable]
     long long ans=0,N=S.size(),i,j,k;
                                ^
shoes.cpp:8:34: warning: unused variable 'j' [-Wunused-variable]
     long long ans=0,N=S.size(),i,j,k;
                                  ^
shoes.cpp:8:36: warning: unused variable 'k' [-Wunused-variable]
     long long ans=0,N=S.size(),i,j,k;
                                    ^
shoes.cpp:9:9: warning: unused variable 't' [-Wunused-variable]
     int t;
         ^

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