Submission #305988

#	Time	Username	Problem	Language	Result	Execution time	Memory
305988		kylych03	Arranging Shoes (IOI19_shoes)	C++14	50 / 100	1089 ms	14900 KiB

shoes

#include "shoes.h"
#include <bits/stdc++.h>
//#include "grader.cpp"
using namespace std;
long long res[200010];
int vis[200011], dp[200010];
vector <int> a[100002], b[100002];
long long count_swaps(std::vector<int> s) {


    long long sum = 0;
    for(int i = 0 ; i < s.size(); i++){
        if(s[i]>0)
            a[s[i]].push_back(i);
        else
            b[abs(s[i])].push_back(i);
    }
    for(int i = 0 ; i <100001;i++){
        for(int j = 0 ; j < a[i].size();j++){
            dp[a[i][j]]=b[i][j];
            dp[b[i][j]]=a[i][j];
        }
    }
    for(int i = 0 ; i < s.size(); i++){

        if(vis[i]==1)
            continue;
        int j=i+1;
        while( j!=dp[i] ){
            res[j]++;
            j++;

        }

        sum += (j - i - 1 + (res[j] - res[i]));
        if(s[i] > 0)
            sum++;
        vis[dp[i]]=1;
    }


	return sum;
}

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:12:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   12 |     for(int i = 0 ; i < s.size(); i++){
      |                     ~~^~~~~~~~~~
shoes.cpp:19:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   19 |         for(int j = 0 ; j < a[i].size();j++){
      |                         ~~^~~~~~~~~~~~~
shoes.cpp:24:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |     for(int i = 0 ; i < s.size(); i++){
      |                     ~~^~~~~~~~~~

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