Submission #778761

#	Time	Username	Problem	Language	Result	Execution time	Memory
778761		DobromirAngelov	Coin Collecting (JOI19_ho_t4)	C++14	100 / 100	37 ms	1108 KiB

joi2019_ho_t4

#include<bits/stdc++.h>
#define endl '\n'

using namespace std;

const int MAXN=1e5+5;

int n;
int cnt[2][MAXN];
long long ans=0;

void add(int t,int x)
{
    if(x<1)
    {
        ans+=1-x;
        cnt[t][1]++;
    }
    else if(x>n)
    {
        ans+=x-n;
        cnt[t][n]++;
    }
    else cnt[t][x]++;
}

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);

    cin>>n;
    for(int i=1; i<=2*n; i++)
    {
        int x,y;
        cin>>x>>y;
        if(y<=1)
        {
            add(0,x);
            ans+=1-y;
        }
        else
        {
            add(1,x);
            ans+=y-2;
        }
    }

    int r0=0,r1=0;
    for(int i=1; i<=n; i++)
    {
        r0+=cnt[0][i];
        r1+=cnt[1][i];
        int vert=0;
        if(r0<i && i<r1)
        {
            vert=min(i-r0, r1-i);
            r0+=vert;
            r1-=vert;
        }
        if(r0>i && i>r1)
        {
            vert=min(r0-i, i-r1);
            r0-=vert;
            r1+=vert;
        }
        ans+=vert;
        ans+=abs(r0+r1-2*i);
    }

    cout<<ans<<endl;
    return 0;
}

• Subtask 1: 8 / 8
• Subtask 2: 29 / 29
• Subtask 3: 63 / 63