Submission #428099

#	Time	Username	Problem	Language	Result	Execution time	Memory
428099		A_D	Arranging Shoes (IOI19_shoes)	C++14	10 / 100	1 ms	292 KiB

shoes

#include "shoes.h"
#include <bits/stdc++.h>
using namespace std;
vector<int> vec;
long long ans=0,cnt=0;
vector<int> s;
void fix(int x)
{
    for(int i=0;i<s.size();i++){
        if(s[i]==x){
            for(int j=i-1;j>=cnt;j--){
                ans++;
                swap(s[j],s[j+1]);
            }
        }
    }
    cnt+=2;
}
long long count_swaps(std::vector<int> S){
    s=S;
    vec.clear();ans=0;cnt=0;
    for(int i=0;i<s.size();i++){
        if(s[i]<0){
            vec.push_back(abs(s[i]));
        }
    }
    for(auto x:vec){
        fix(-x);
    }
    cnt=1;
    for(auto x:vec){
        fix(x);
    }
    return ans;
    if(s.size()==2)return s[0]>s[1];
	long long n=s.size();
	n/=2;
	return n*(n-1)/2;
}

Compilation message (stderr)

shoes.cpp: In function 'void fix(int)':
shoes.cpp:9:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    9 |     for(int i=0;i<s.size();i++){
      |                 ~^~~~~~~~~
shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:22:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |     for(int i=0;i<s.size();i++){
      |                 ~^~~~~~~~~

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