oj.uz

Submission #571638

# Submission time Handle Problem Language Result Execution time Memory
571638 2022-06-02T12:32:19 Z nttt Election (BOI18_election) C++14
100 / 100
 657 ms 20256 KB 
#include<bits/stdc++.h>
using namespace std;
#define MASK(i) (1LL << (i))
#define BIT(x, i) ((x >> (i)) & 1)
#define fi first
#define se second
#define ll long long
#define task "name" 

const int oo = 1e9 + 7;
const ll loo = (ll)1e18 + 7;
const int MOD = 1e9 + 7;
const int N = 5e5 + 3;
const int BASE = 10;

template <typename T1, typename T2> bool minimize(T1 &a, T2 b)
{
    if (a > b) {a = b; return true;} return false;
}
template <typename T1, typename T2> bool maximize(T1 &a, T2 b)
{
    if (a < b) {a = b; return true;} return false;
}

struct nodes
{
    int sum = 0;
    int pr = 0;
    int sf = 0;
    int ans = 0;
} node[4 * N], base;
int n;
string s;
nodes add(nodes a, nodes b) 
{
	nodes c;
	c.sum = a.sum + b.sum;
	c.pr = max(a.pr, a.sum + b.pr);
	c.sf = max(b.sf, b.sum + a.sf);
	c.ans = max(a.sum + b.ans, a.ans + b.sum);
	c.ans = max(c.ans, a.pr + b.sf);
	return c;
}
void build(int id, int l, int r, int pos, int x)
{
    if(l > r || pos < l || r < pos) return;
    if (l == r) 
    {
	    node[id].sum = x;
		maximize(node[id].pr, x);
		maximize(node[id].sf, x);
		maximize(node[id].ans, x);
		return;
	}
    int mid = (l + r)/2;
	build(id * 2, l, mid, pos, x);
    build(id * 2 + 1, mid + 1, r, pos, x);
	node[id] = add(node[id * 2], node[id * 2 + 1]);
}

nodes get(int id, int l, int r, int u, int v)
{
    if (r < u || v < l) return base;
	if (u <= l && r <= v) return node[id];
    int mid = (l + r)/2;
	return add(get(id * 2, l, mid, u, v), get(id * 2 + 1, mid + 1, r, u, v));
}
int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    //freopen(task".inp" , "r" , stdin);
    //freopen(task".out" , "w" , stdout);
    
    cin >> n >> s;
    for (int i = 0; i < n; i++)
    {
        if(s[i] == 'T') build(1, 1, n, i + 1, 1);
        else build(1, 1, n, i + 1, -1);
    }
    int q;
    cin >> q;
    while(q--)
    {
        int l, r;
        cin >> l >> r;
        cout << get(1, 1, n, l, r).ans << '\n';
    }

    return 0;
}

Subtask #1
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 340 KB Output is correct
2 Correct 2 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 2 ms 340 KB Output is correct
5 Correct 3 ms 340 KB Output is correct

Subtask #2
54.0 / 54.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 340 KB Output is correct
2 Correct 2 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 2 ms 340 KB Output is correct
5 Correct 3 ms 340 KB Output is correct
6 Correct 61 ms 4784 KB Output is correct
7 Correct 54 ms 4844 KB Output is correct
8 Correct 53 ms 4812 KB Output is correct
9 Correct 56 ms 4760 KB Output is correct
10 Correct 61 ms 4632 KB Output is correct
11 Correct 58 ms 4988 KB Output is correct
12 Correct 60 ms 4832 KB Output is correct
13 Correct 57 ms 4876 KB Output is correct
14 Correct 80 ms 4896 KB Output is correct
15 Correct 54 ms 4852 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 340 KB Output is correct
2 Correct 2 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 2 ms 340 KB Output is correct
5 Correct 3 ms 340 KB Output is correct
6 Correct 61 ms 4784 KB Output is correct
7 Correct 54 ms 4844 KB Output is correct
8 Correct 53 ms 4812 KB Output is correct
9 Correct 56 ms 4760 KB Output is correct
10 Correct 61 ms 4632 KB Output is correct
11 Correct 58 ms 4988 KB Output is correct
12 Correct 60 ms 4832 KB Output is correct
13 Correct 57 ms 4876 KB Output is correct
14 Correct 80 ms 4896 KB Output is correct
15 Correct 54 ms 4852 KB Output is correct
16 Correct 554 ms 19332 KB Output is correct
17 Correct 445 ms 19284 KB Output is correct
18 Correct 512 ms 19404 KB Output is correct
19 Correct 491 ms 18788 KB Output is correct
20 Correct 604 ms 18380 KB Output is correct
21 Correct 629 ms 20128 KB Output is correct
22 Correct 566 ms 20072 KB Output is correct
23 Correct 568 ms 20256 KB Output is correct
24 Correct 582 ms 19876 KB Output is correct
25 Correct 657 ms 19380 KB Output is correct