Submission #861390

#	Time	Username	Problem	Language	Result	Execution time	Memory
861390		maks007	Election (BOI18_election)	C++14	28 / 100	3069 ms	1128 KiB

election

#include "bits/stdc++.h"

using namespace std;

#define int long long

signed main () {
	ios::sync_with_stdio(0);
	cin.tie(0); cout.tie(0);
	int n;
	cin >> n;
	string str;
	cin >> str;
	int q;
	cin >> q;
	while(q --) {
		int l, r;
		cin >> l >> r;
		l --, r --;
		int bal = 0;
		set <int> s1, s2;
		for(int i = l; i <= r; i ++) {
			if(str[i] == 'C') bal ++;
			else if(bal == 0) {
				s1.insert(i);
			}else bal --;
		}
		 bal = 0;
		for(int i = r; i >= l; i --) {
			if(s1.count(i)) continue;
			if(str[i] == 'C') bal ++;
			else if(bal == 0) {
				s2.insert(i);
			}else bal --;
		}
		for(auto i : s2) s1.insert(i);
		cout << s1.size() << "\n";
	}
	return 0;
}

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