Submission #143299

#	Time	Username	Problem	Language	Result	Execution time	Memory
143299		mat_v	Arranging Shoes (IOI19_shoes)	C++14	50 / 100	1087 ms	17480 KiB

shoes

#include <bits/stdc++.h>
#include <cstdio>
#include <cassert>
#define pb push_back

using namespace std;

int n;
vector<int> tike[200005][2];
int dokle[200005][2];
long long count_swaps(std::vector<int> s) {
    n = s.size()/2;
    for(int i=0; i<2*n; i++){
        if(s[i] < 0)tike[abs(s[i])][0].pb(i);
        else tike[s[i]][1].pb(i);
    }
    int l = 0;
    long long res = 0;
    while(l < 2*n){
        int koji = abs(s[l]);
        int pom = l+1;
        while(pom < 2*n){
            if(s[pom] == -s[l])break;
            pom++;
        }
        while(pom > l+1){
            swap(s[pom], s[pom - 1]);
            pom--;
            res++;
        }
        if(s[l] > 0)res++;
        l += 2;
    }
    return res;
}

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:20:13: warning: unused variable 'koji' [-Wunused-variable]
         int koji = abs(s[l]);
             ^~~~

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