Submission #670797

#	Time	Username	Problem	Language	Result	Execution time	Memory
670797		Sohsoh84	Election (BOI18_election)	C++17	0 / 100	13 ms	448 KiB

election

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<ll, ll> pll;

#define all(x)			(x).begin(),(x).end()
#define X			first
#define Y			second
#define sep			' '
#define endl			'\n'
#define debug(x)		cerr << #x << ": " <<  x << endl;

const ll MAXN = 1e6 + 10;

int ps[MAXN], ss[MAXN];
string s;

inline void solve(string s) {
	int n = s.size();
	s = "#" + s;
	for (int i = 1; i <= n; i++)
		ps[i] = ps[i - 1] + (s[i] == 'T' ? 1 : -1);

	ss[n + 1] = 0;
	for (int i = n; i > 0; i--)
		ss[i] = ss[i + 1] + (s[i] == 'T' ? 1 : -1);

	int ans = 0;
	for (int i = 1; i <= n; i++)
		ans = max(ans, max(ps[i], 0) + max(ss[i + 1], 0));
	
	cout << ans << endl;
}

int main() {
	ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
	int n, q;
	cin >> n >> s >> q;
	while (q--) {
		int l, r;
		cin >> l >> r;
		solve(s.substr(l - 1, r));
	}
	return 0;
}

• Subtask 1: 0 / 28
• Subtask 2: 0 / 54
• Subtask 3: 0 / 18