oj.uz

Submission #699185

# Submission time Handle Problem Language Result Execution time Memory
699185 2023-02-16T01:30:21 Z bane Election (BOI18_election) C++17
100 / 100
 428 ms 28000 KB 
#include<iostream>
#include<vector>
#include<algorithm>
#include<unordered_map>
#include<deque>
#include<map>
#include<set>
#include<unordered_set>
#include<math.h>
//#include<bits/stdc++.h>
using namespace std;
 
#ifdef LOCAL
    #define eprintf(...) {fprintf(stderr, __VA_ARGS__);fflush(stderr);}
#else
    #define eprintf(...) 42
#endif
 
#define pb push_back
#define mp make_pair
#define ins insert
#define popb pop_back
#define popf pop_front
#define ft front
#define bk back
#define fr first
#define sc second
using ll = long long;
using ld = long double;
using db = double;
using ull = unsigned long long;
using pii = pair<int,int>;
using pll = pair<ll,ll>;
using pdd = pair<ld,ld>;
using str = string;
const int NAX = (int)1e5 + 1;
const int MOD = (int)1e9 + 7;
int n, q;
string s;
struct Node{
    int P,S,T,A;
    Node operator+(Node a){
        Node ans;
        ans.P = max(T + a.P, P);
        ans.S = max(a.S, a.T + S);
        ans.T = T + a.T;
        ans.A = max(max(A + a.T, a.A + T), P + a.S);
        return ans;
    }
};
template<class V, int NV>class SegmentTree{
public:
    Node t[NV * 3];
    
    void build(int l = 0, int r = n - 1, int k = 1){
        if (l == r){
            if (s[l] == 'T') t[k] = {1, 1, 1, 1};
            else t[k] = {0, 0, -1, 0};
            return ;
        }
        int mid = (l + r) / 2;
        build(l, mid, k * 2);
        build(mid + 1, r, k * 2 | 1);
        t[k] = t[k * 2] + t[k * 2 | 1];
    }
    Node query(int lef, int rig, int l = 0, int r = n - 1, int k = 1){
        if (r < lef || l > rig)return {0,0,0,0};
        if (l>=lef && r <= rig)return t[k];
        return query(lef,rig,l,(r+l)/ 2, k * 2) + query(lef,rig, (l+r)/2+1,r,1+k*2);
    }
};
SegmentTree<int, (1<<20)>st;
int main(){
    ios::sync_with_stdio(0);
    cin.tie(0);
    cin >> n >> s >> q;
    // [l...r]
    //[CCCTTTCCTTT...]
    //find how many erasers are needed using segment tree from one side
    st.build();
    while(q--){
        int a,b;
        cin >>  a >> b;
        cout<<st.query(--a,--b).A<<'\n';
    }
    return 0;
}

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 348 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 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 348 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 47 ms 5792 KB Output is correct
7 Correct 41 ms 5672 KB Output is correct
8 Correct 41 ms 5712 KB Output is correct
9 Correct 39 ms 5780 KB Output is correct
10 Correct 43 ms 5580 KB Output is correct
11 Correct 43 ms 5864 KB Output is correct
12 Correct 42 ms 5852 KB Output is correct
13 Correct 44 ms 5836 KB Output is correct
14 Correct 43 ms 5820 KB Output is correct
15 Correct 43 ms 5708 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 348 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 47 ms 5792 KB Output is correct
7 Correct 41 ms 5672 KB Output is correct
8 Correct 41 ms 5712 KB Output is correct
9 Correct 39 ms 5780 KB Output is correct
10 Correct 43 ms 5580 KB Output is correct
11 Correct 43 ms 5864 KB Output is correct
12 Correct 42 ms 5852 KB Output is correct
13 Correct 44 ms 5836 KB Output is correct
14 Correct 43 ms 5820 KB Output is correct
15 Correct 43 ms 5708 KB Output is correct
16 Correct 415 ms 26948 KB Output is correct
17 Correct 344 ms 26596 KB Output is correct
18 Correct 374 ms 26848 KB Output is correct
19 Correct 330 ms 26456 KB Output is correct
20 Correct 408 ms 26096 KB Output is correct
21 Correct 412 ms 28000 KB Output is correct
22 Correct 418 ms 27876 KB Output is correct
23 Correct 410 ms 28000 KB Output is correct
24 Correct 428 ms 27764 KB Output is correct
25 Correct 411 ms 27104 KB Output is correct