oj.uz

Submission #107367

# Submission time Handle Problem Language Result Execution time Memory
107367 2019-04-23T13:28:35 Z Saboon Election (BOI18_election) C++14
100 / 100
 1950 ms 38260 KB 
#include <bits/stdc++.h>

using namespace std;
typedef long long ll;

const int maxn = 5e5 + 10;

struct node{
	int compT;
	int lefT;
	int rigT;
	int remT;
	int frelefC;
	int frerigC;
	
	void merge(node oth){
		int tmp = min(frerigC, oth.lefT);
		compT += tmp;
		frerigC -= tmp;
		oth.lefT -= tmp;
		
		tmp = min(rigT, oth.frelefC);
		compT += tmp;
		rigT -= tmp;
		oth.frelefC -= tmp;
	
		tmp = min(remT, oth.frelefC);
		lefT += tmp;
		remT -= tmp;
		oth.frelefC -= tmp;

		tmp = min(frerigC, oth.remT);
		rigT += tmp;
		frerigC -= tmp;
		oth.remT -= tmp;

		tmp = min(rigT, oth.lefT);
		compT += tmp;
		rigT -= tmp;
		oth.lefT -= tmp;
		remT += tmp;

		compT += oth.compT;
		lefT += oth.lefT;
		rigT += oth.rigT;
		remT += oth.remT;
		frelefC += oth.frelefC;
		frerigC += oth.frerigC;
	}

	void debug(){
		cout << "complete T : " << compT << endl;
		cout << "left C need for T : " << lefT << endl;
		cout << "right C need for T : " << rigT << endl;
		cout << "empty T : " << remT << endl;
		cout << "Free left C's " << frelefC << endl;
		cout << "Free Right C's " << frerigC << endl;
	}
};

node seg[4 * maxn];

string s;

node get(int id, int L, int R, int l, int r){
	if (L == l and R == r)
		return seg[id];
	int mid = (L + R) >> 1;
	if (mid >= r)
		return get(2 * id + 0, L, mid, l, r);
	if (mid <= l)
		return get(2 * id + 1, mid, R, l, r);
	node me = get(2 * id + 0, L, mid, l, mid);
	me.merge(get(2 * id + 1, mid, R, mid, r));
	return me;
}

void build(int id, int L, int R){
	if (L + 1 == R){
		if (s[L] == 'T')
			seg[id].remT ++;
		else
			seg[id].frelefC = seg[id].frerigC = 1;
		return;
	}
	int mid = (L + R) >> 1;
	build(2 * id + 0, L, mid);
	build(2 * id + 1, mid, R);
	seg[id] = seg[2 * id + 0];
	seg[id].merge(seg[2 * id + 1]);
//	cout << "################printing : " << L << " " << R << endl;
//	seg[id].debug();
}

int par[maxn];

int main(){
	ios_base::sync_with_stdio(false);
	int n;
	cin >> n;
	cin >> s;
	build(1, 0, n);
	for (int i = 0; i < n; i++)
		par[i] = (s[i] == 'C') + (i > 0 ? par[i - 1] : 0);
	int m;
	cin >> m;
	for (int i = 0; i < m; i++){
		int l, r;
		cin >> l >> r;
		l --, r --;
		int rem = par[r] - (l > 0 ? par[l - 1] : 0) + get(1, 0, n, l, r + 1).compT;
		cout << (r - l + 1) - rem << '\n';
	}
}

Subtask #1
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 512 KB Output is correct
2 Correct 7 ms 512 KB Output is correct
3 Correct 6 ms 512 KB Output is correct
4 Correct 6 ms 448 KB Output is correct
5 Correct 7 ms 512 KB Output is correct

Subtask #2
54.0 / 54.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 512 KB Output is correct
2 Correct 7 ms 512 KB Output is correct
3 Correct 6 ms 512 KB Output is correct
4 Correct 6 ms 448 KB Output is correct
5 Correct 7 ms 512 KB Output is correct
6 Correct 241 ms 8284 KB Output is correct
7 Correct 189 ms 8224 KB Output is correct
8 Correct 199 ms 8056 KB Output is correct
9 Correct 173 ms 8056 KB Output is correct
10 Correct 200 ms 8056 KB Output is correct
11 Correct 212 ms 8300 KB Output is correct
12 Correct 208 ms 8260 KB Output is correct
13 Correct 204 ms 8380 KB Output is correct
14 Correct 198 ms 8312 KB Output is correct
15 Correct 187 ms 8356 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 512 KB Output is correct
2 Correct 7 ms 512 KB Output is correct
3 Correct 6 ms 512 KB Output is correct
4 Correct 6 ms 448 KB Output is correct
5 Correct 7 ms 512 KB Output is correct
6 Correct 241 ms 8284 KB Output is correct
7 Correct 189 ms 8224 KB Output is correct
8 Correct 199 ms 8056 KB Output is correct
9 Correct 173 ms 8056 KB Output is correct
10 Correct 200 ms 8056 KB Output is correct
11 Correct 212 ms 8300 KB Output is correct
12 Correct 208 ms 8260 KB Output is correct
13 Correct 204 ms 8380 KB Output is correct
14 Correct 198 ms 8312 KB Output is correct
15 Correct 187 ms 8356 KB Output is correct
16 Correct 1796 ms 37224 KB Output is correct
17 Correct 1564 ms 36860 KB Output is correct
18 Correct 1608 ms 37260 KB Output is correct
19 Correct 1362 ms 36876 KB Output is correct
20 Correct 1568 ms 36364 KB Output is correct
21 Correct 1753 ms 38260 KB Output is correct
22 Correct 1838 ms 38108 KB Output is correct
23 Correct 1782 ms 38260 KB Output is correct
24 Correct 1733 ms 38028 KB Output is correct
25 Correct 1950 ms 37552 KB Output is correct