oj.uz

Submission #572031

# Submission time Handle Problem Language Result Execution time Memory
572031 2022-06-03T11:22:10 Z Doanxem99 Election (BOI18_election) C++14
100 / 100
 519 ms 21340 KB 
#include <bits/stdc++.h>
using namespace std;
#define ar array< int , 2>
#define MASK(i) (1 << (i))
#define BIT(x, i) (((x) >> (i)) & 1)
template<typename T1, typename T2> bool minN(T1 &a, T2 b) {if (a > b) a = b; else return 0; return 1;}
template<typename T1, typename T2> bool maxX(T1 &a, T2 b) {if (a < b) a = b; else return 0; return 1;}
const int MAX = 2e6 + 1000;
int n, k, Size, x, y;
string s;
struct Node
{
    int sum = 0, minEraL = 0, minEraR = 0, ans = 0;
};
Node f[MAX], base;
Node Cal(Node a, Node b)
{
    Node c;
    c.sum = a.sum + b.sum;
    c.minEraL = max(a.minEraL, a.sum + b.minEraL);
    c.minEraR = max(b.minEraR, b.sum + a.minEraR);
    c.ans = max({a.minEraL + b.minEraR, a.sum + b.ans, a.ans + b.sum});
    return c;
}
void Build(int id, int l, int r)
{
    if (l > r) return;
    if (l == r)
    {
        int temp = (s[l] == 'C' ? -1 : (s[l] == 'T') ? 1 : 0);
        //cout << l << " " << temp << " " << id << '\n' ;
        f[id].sum = temp;
        maxX(f[id].minEraL, temp);
        maxX(f[id].minEraR, temp);
        maxX(f[id].ans, temp);
        return ;
    }
    int mid = (l + r) >> 1;
    Build(id * 2, l, mid);
    Build(id * 2 + 1, mid + 1, r);
    f[id] = Cal(f[id * 2], f[id * 2 + 1]);
}
Node Get(int id, int l, int r, int ll, int rr)
{
    if (ll > rr || rr < l || ll > r) return base;
    if (l <= ll && rr <= r) return f[id];
    int mid = (ll + rr) >> 1;
    return Cal(Get(id * 2, l, r, ll, mid), Get(id * 2 + 1, l, r, mid + 1, rr));
}
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin >> n;
    Size = 1;
    while (Size < n) Size *= 2;
    cin >> s;
    s = "#" + s;
    //for (int i = n; i <= Size; i++) s = s + "#";
    Build(1, 1, n);
    cin >> k;
    for (int i = 1; i <= k; i++)
    {
        cin >> x >> y;
        cout << Get(1, x, y, 1, n).ans << '\n' ;
    }
    //cout << Get(1, 4, 9, 1, n).sum << '\n' ;
}
/*
11
CCCTTTTTTCC
3
1 11
4 9
1 6

*/

Subtask #1
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 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 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 2 ms 340 KB Output is correct
6 Correct 46 ms 4804 KB Output is correct
7 Correct 45 ms 4784 KB Output is correct
8 Correct 48 ms 4808 KB Output is correct
9 Correct 44 ms 4788 KB Output is correct
10 Correct 54 ms 4680 KB Output is correct
11 Correct 45 ms 4912 KB Output is correct
12 Correct 45 ms 4932 KB Output is correct
13 Correct 58 ms 4844 KB Output is correct
14 Correct 72 ms 4876 KB Output is correct
15 Correct 54 ms 4808 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 2 ms 340 KB Output is correct
6 Correct 46 ms 4804 KB Output is correct
7 Correct 45 ms 4784 KB Output is correct
8 Correct 48 ms 4808 KB Output is correct
9 Correct 44 ms 4788 KB Output is correct
10 Correct 54 ms 4680 KB Output is correct
11 Correct 45 ms 4912 KB Output is correct
12 Correct 45 ms 4932 KB Output is correct
13 Correct 58 ms 4844 KB Output is correct
14 Correct 72 ms 4876 KB Output is correct
15 Correct 54 ms 4808 KB Output is correct
16 Correct 442 ms 20192 KB Output is correct
17 Correct 386 ms 20332 KB Output is correct
18 Correct 443 ms 20372 KB Output is correct
19 Correct 419 ms 19852 KB Output is correct
20 Correct 460 ms 19572 KB Output is correct
21 Correct 487 ms 21176 KB Output is correct
22 Correct 519 ms 21116 KB Output is correct
23 Correct 471 ms 21340 KB Output is correct
24 Correct 454 ms 20964 KB Output is correct
25 Correct 466 ms 20512 KB Output is correct