Submission #1107367

#	Time	Username	Problem	Language	Result	Execution time	Memory
1107367		vjudge1	Growing Vegetable is Fun 3 (JOI19_ho_t3)	C++17	15 / 100	1 ms	504 KiB

joi2019_ho_t3

#include <bits/stdc++.h>

using namespace std;

#define int long long
#define sz(x) x.size()
#define pb push_back
#define F first
#define S second
#define nl '\n'

void solve()
{
	int n;
	string s;
	cin >>n >>s;
	int cntr = 0, cntg = 0;
	vector< int >r, g;
	int pr[n], pg[n];
	pr[0] = pg[0] = 0;
	for( int i = 0; i < n; ++i )
	{
		if( i > 0 )
		{
			pr[i] = pr[i - 1];
			pg[i] = pg[i - 1];
		}
		if( s[i] == 'R' )
		{
			r.pb( i );
			++pr[i];
			++cntr;
		}
		else
		{
			g.pb( i );
			++pg[i];
			++cntg;
		}
	}
	if( cntg > cntr )
	{
		swap(cntr, cntg);
		swap(r, g);
		for( int i = 0; i < n; ++i )
			swap(pr[i], pg[i]);
	}
	if( cntr - cntg > 1 )
	{
		cout <<-1;
		return;
	}
	int ans = 0;
	if( cntr > cntg )
	{
		int pos = 1;
		for( int i: g )
		{
			ans += abs(pos - i);
			pos += 2;
		}
	}
	else
	{
		int cnt1 = 0, cnt2 = 0, pos = 0;
		for( int i: r )
		{
			cnt1 += abs(i - pos);
			pos += 2;
		}
		pos = 0;
		for( int i: g )
		{
			cnt2 += abs(i - pos);
			pos += 2;
		}
		ans = min(cnt1, cnt2);
	}
	cout <<ans;
}

signed main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    // freopen("input.txt", "r", stdin);
    // freopen("output.txt", "w", stdout);
    int T = 1;
    // cin >>T;
    while( T-- )
    	solve();
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 55
• Subtask 3: 15 / 15
• Subtask 4: 0 / 25