Submission #146115

#	Time	Username	Problem	Language	Result	Execution time	Memory
146115		HellAngel	Arranging Shoes (IOI19_shoes)	C++14	Compilation error	0 ms	0 KiB

shoes

#include <bits/stdc++.h>
using namespace std;

const int maxn = 1e5 + 7;
long long n, BIT[maxn];
queue<long long> q[maxn];

void Update(long long u, long long v)
{
    for(; u < maxn; u += u & -u) BIT[u]+= v;
}

long long Get(long long u)
{
    long long ans = 0;
    for(; u > 0; u -= u & -u) ans += BIT[u];
    return ans;
}

long long count_swaps(vector<long long> vt)
{
    long long ans = 0;
    n = vt.size() / 2;
    for(long long i = 0; i < n * 2; i++)
    {
        if(vt[i] > 0)
        {
            q[vt[i]].push(i);
        }
        Update(i + 1, 1);
    }
    long long cnt = 1;
    for(long long i = 0; i < n * 2; i++)
    {
        if(vt[i] < 0)
        {
            long long gau = Get(i + 1);
            ans += gau - cnt;
            cnt++;
            Update(1, 1);
            Update(i + 1, -1);
            long long posr = q[-vt[i]].front();
            q[-vt[i]].pop();
            long long meo = Get(posr + 1);
            ans += meo - cnt;
            cnt++;
            Update(1, 1);
            Update(posr + 1, -1);
        }
    }
    return ans;
}

Compilation message (stderr)

/tmp/ccSOCBuv.o: In function `main':
grader.cpp:(.text.startup+0x272): undefined reference to `count_swaps(std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status