oj.uz

Submission #571663

# Submission time Handle Problem Language Result Execution time Memory
571663 2022-06-02T13:38:29 Z nttt Election (BOI18_election) C++14
100 / 100
 593 ms 20288 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);
    //c.ans = max(c.pr, c.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 3 ms 340 KB Output is correct
3 Correct 2 ms 340 KB Output is correct
4 Correct 2 ms 340 KB Output is correct
5 Correct 2 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 3 ms 340 KB Output is correct
3 Correct 2 ms 340 KB Output is correct
4 Correct 2 ms 340 KB Output is correct
5 Correct 2 ms 340 KB Output is correct
6 Correct 60 ms 4816 KB Output is correct
7 Correct 57 ms 4776 KB Output is correct
8 Correct 55 ms 4776 KB Output is correct
9 Correct 50 ms 4744 KB Output is correct
10 Correct 53 ms 4688 KB Output is correct
11 Correct 63 ms 4852 KB Output is correct
12 Correct 63 ms 4876 KB Output is correct
13 Correct 54 ms 4956 KB Output is correct
14 Correct 60 ms 4900 KB Output is correct
15 Correct 53 ms 4788 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 3 ms 340 KB Output is correct
3 Correct 2 ms 340 KB Output is correct
4 Correct 2 ms 340 KB Output is correct
5 Correct 2 ms 340 KB Output is correct
6 Correct 60 ms 4816 KB Output is correct
7 Correct 57 ms 4776 KB Output is correct
8 Correct 55 ms 4776 KB Output is correct
9 Correct 50 ms 4744 KB Output is correct
10 Correct 53 ms 4688 KB Output is correct
11 Correct 63 ms 4852 KB Output is correct
12 Correct 63 ms 4876 KB Output is correct
13 Correct 54 ms 4956 KB Output is correct
14 Correct 60 ms 4900 KB Output is correct
15 Correct 53 ms 4788 KB Output is correct
16 Correct 593 ms 19204 KB Output is correct
17 Correct 473 ms 19272 KB Output is correct
18 Correct 549 ms 19304 KB Output is correct
19 Correct 437 ms 18868 KB Output is correct
20 Correct 525 ms 18260 KB Output is correct
21 Correct 544 ms 20288 KB Output is correct
22 Correct 561 ms 20048 KB Output is correct
23 Correct 525 ms 20232 KB Output is correct
24 Correct 526 ms 20052 KB Output is correct
25 Correct 530 ms 19468 KB Output is correct