Submission #61439

#	Time	Username	Problem	Language	Result	Execution time	Memory
61439		sean617	JOIOJI (JOI14_joioji)	C++98	0 / 100	4 ms	836 KiB

joioji

#include <iostream>
#include <cstdio>
using namespace std;

int n, l, r, md, ans, s[3][200005];
string a;
int main()
{
	int i, z;
	cin >> n;
	cin >> a;
	a = ' ' + a;
	for (i = 1; i <= n;i++) {
		s[0][i] = s[0][i - 1];
		s[1][i] = s[1][i - 1];
		s[2][i] = s[2][i - 1];
		if (a[i] == 'J') s[0][i]++;
		else if (a[i] == 'O') s[1][i]++;
		else s[2][i]++;
	}
	l = 0;
	r = n / 3 + 1;
	while (l < r) {
		md = (l + r) / 2;
		z = md * 3 - 1;
		for (i = 1; i + z <= n; i++) {
			if (s[0][i + z] - s[0][i - 1] == s[1][i + z] - s[1][i - 1] && s[2][i + z] - s[2][i - 1] == md) break;
		}
		if (i + z <= n) {ans = md; l = md + 1;}
		else r = md;
	}
	cout << ans * 3;
    return 0;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 15
• Subtask 3: 0 / 80