Submission #1011674

#	Time	Username	Problem	Language	Result	Execution time	Memory
1011674		u_suck_o	Arranging Shoes (IOI19_shoes)	C++17	45 / 100	19 ms	3260 KiB

shoes

#include "bits/stdc++.h"
#include "shoes.h"

using namespace std;

long long count_swaps(vector<int> s) {
    long long ans = 0;
    long long n = s.size()/2;
    int p1 = 1, p2 = 1;
    for (int i = 0; i < 2*n; i++) {
        p1 = max(i+1, p1);
        p2 = max(i+1, p2);
        if (i % 2 == 0) {
            if (s[i] < 0)
                continue;
            while (s[p1] > 0) p1++;
            swap(s[i], s[p1]);
            ans += p1 - i;
        }
        if (i % 2 == 1) {
            if (s[i] > 0)
                continue;
            while (s[p2] < 0) p2++;
            swap(s[i], s[p2]);
            ans += p2 - i;
        }
    }
    return ans;
}

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