Submission #850852

#	Time	Username	Problem	Language	Result	Execution time	Memory
850852		danikoynov	Chorus (JOI23_chorus)	C++14	16 / 100	34 ms	360 KiB

chorus

/**
 ____ ____ ____ ____ ____ ____
||l |||e |||i |||n |||a |||d ||
||__|||__|||__|||__|||__|||__||
|/__\|/__\|/__\|/__\|/__\|/__\|

**/

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

using namespace std;
typedef long long ll;

void speed()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
}

int n, k;
string s;
int check(int mask)
{
    int cnt0 = 0, cnt1 = 0, ans = 0;
    /**for (int i = 0; i < 2 * n; i ++)
    {
        if ((mask & (1 << i)) > 0)
            cout << 1;
        else
            cout << 0;
    }
    cout << endl;*/
    for (int i = 0; i < 2 * n; i ++)
    {
        int cur = 0;
        if ((mask & (1 << i)) > 0)
            cur ++;
        ///cout << i << " : " << cnt0 << " : " << cnt1 << endl;
        if (cur == 0)
        {
            cnt0 ++;
            continue;
        }

        if (cnt1 > 0)
            cnt1 --;
        else
        {
            if (cnt0 == 0)
                return 2 * n + 1;
            cnt1 = cnt0 - 1;
            cnt0 = 0;
            ans ++;
        }
    }

    return ans;
}
void solve()
{
    cin >> n >> k >> s;
    /**int ms = 0;
    for (int i = 0; i < 2 * n; i ++)
        if (s[i] == 'B')
        ms = (ms | (1 << i));
    cout << ms << " : " << check(ms) << endl;
            for (int j = 0; j < 2 * n; j ++)
        cout << ((ms & (1 << j)) > 0);
        cout << endl;
    return;*/
    int ans = n * n;
    for (int mask = 0; mask <= (1 << (2 * n)); mask ++)
    {
        int cnt = 0;
        for (int i = 0; i < 2 * n; i ++)
        {
            if ((mask & (1 << i)) > 0)
                cnt ++;
        }
        if (cnt != n)
            continue;

        int cur = 0, pt = 0;
        for (int i = 0; i < 2 * n; i ++)
        {
            if (s[i] == 'B')
                continue;
            while((mask & (1 << pt)) > 0)
                pt ++;
            ///cout << i << " : " << pt << endl;
            cur = cur + abs(i - pt);
            pt ++;
        }
        /**for (int j = 0; j < 2 * n; j ++)
        cout << ((mask & (1 << j)) > 0);
        cout << endl;*/
        ///if (check(mask) == 0)
        ///cout << mask << endl;
        ///cout << mask << " : " << check(mask) << " " << cur << endl;
        if (check(mask) <= k)
        {
            //if (cur == 0)
              //  cout << "!!! " << mask << endl;
            ///cout << mask << endl;
            ans = min(ans, cur);
            ///cout << ans << endl;
        }


    }

    cout << ans << endl;
}

int main()
{
    solve();
    return 0;
}

• Subtask 1: 16 / 16
• Subtask 2: 0 / 24
• Subtask 3: 0 / 21
• Subtask 4: 0 / 26
• Subtask 5: 0 / 13