oj.uz

Submission #571634

# Submission time Handle Problem Language Result Execution time Memory
571634 2022-06-02T12:30:40 Z nttt Election (BOI18_election) C++14
100 / 100
 528 ms 29924 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;
int a[N];
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, a[l]);
// 		maximize(node[id].sf, a[l]);
// 		maximize(node[id].ans, a[l]);
// 		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]);
// }
void build(int id, int l, int r)
{
    if (l == r) 
    {
	    node[id].sum = a[l];
		maximize(node[id].pr, a[l]);
		maximize(node[id].sf, a[l]);
		maximize(node[id].ans, a[l]);
		return;
	}
    int mid = (l + r)/2;
	build(id * 2, l, mid);
    build(id * 2 + 1, mid + 1, r);
	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') 
        {
            a[i + 1] = 1;
            //build(1, 1, n, i + 1, 1);
        }
        else 
        {
            a[i + 1] = -1;
            //build(1, 1, n, i + 1, -1);
        }
    }
    build(1, 1, n);
    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 352 KB Output is correct
3 Correct 2 ms 436 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 2 ms 352 KB Output is correct
3 Correct 2 ms 436 KB Output is correct
4 Correct 2 ms 340 KB Output is correct
5 Correct 2 ms 340 KB Output is correct
6 Correct 55 ms 6064 KB Output is correct
7 Correct 50 ms 6036 KB Output is correct
8 Correct 50 ms 5980 KB Output is correct
9 Correct 47 ms 6012 KB Output is correct
10 Correct 47 ms 5948 KB Output is correct
11 Correct 49 ms 6100 KB Output is correct
12 Correct 44 ms 6096 KB Output is correct
13 Correct 56 ms 6136 KB Output is correct
14 Correct 46 ms 6092 KB Output is correct
15 Correct 52 ms 6080 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 352 KB Output is correct
3 Correct 2 ms 436 KB Output is correct
4 Correct 2 ms 340 KB Output is correct
5 Correct 2 ms 340 KB Output is correct
6 Correct 55 ms 6064 KB Output is correct
7 Correct 50 ms 6036 KB Output is correct
8 Correct 50 ms 5980 KB Output is correct
9 Correct 47 ms 6012 KB Output is correct
10 Correct 47 ms 5948 KB Output is correct
11 Correct 49 ms 6100 KB Output is correct
12 Correct 44 ms 6096 KB Output is correct
13 Correct 56 ms 6136 KB Output is correct
14 Correct 46 ms 6092 KB Output is correct
15 Correct 52 ms 6080 KB Output is correct
16 Correct 528 ms 28956 KB Output is correct
17 Correct 378 ms 28512 KB Output is correct
18 Correct 476 ms 28780 KB Output is correct
19 Correct 371 ms 28304 KB Output is correct
20 Correct 480 ms 27952 KB Output is correct
21 Correct 482 ms 29756 KB Output is correct
22 Correct 460 ms 29672 KB Output is correct
23 Correct 466 ms 29924 KB Output is correct
24 Correct 488 ms 29512 KB Output is correct
25 Correct 442 ms 29040 KB Output is correct