oj.uz

Submission #871543

# Submission time Handle Problem Language Result Execution time Memory
871543 2023-11-11T05:15:38 Z resting Chorus (JOI23_chorus) C++17
40 / 100
 122 ms 626772 KB 
#include <bits/stdc++.h>
using namespace std;

#define int long long

struct segtree{
    int l, r, i; double m, b; int cnt;
    segtree* lc = 0, *rc = 0;
    segtree* getmem();
    segtree(int l, int r) : l(l), r(r), m(0), b(1e9), cnt(0){
        i = (l + r) / 2;
        if(l==r) return;
        lc = getmem(); *lc = segtree(l, i);
        rc = getmem(); *rc = segtree(i+1, r);
    };
    segtree() : segtree(-1, -1){};
    void u(double qm, double qb, int qcnt){
        if(qm * i + qb < m*i+b){
            swap(m, qm); swap(b, qb); swap(cnt, qcnt);
        }
        if(l == r) return;
        if(qm > m) lc->u(qm, qb, qcnt);
        else rc->u(qm, qb, qcnt);
    }
    pair<double, int> q(int qi){
        pair<double, int> cur = {m*qi+b, cnt};
        if(i == qi) return cur;
        if(qi < i) return min(cur, lc->q(qi));
        else return min(cur, rc->q(qi));
    }

} mem[(int)1e7]; int memsz = 0; 
segtree* segtree::getmem(){return &mem[memsz++];}


signed main(){
    int n, k; cin >> n >> k;
    string s; cin >> s;
    double l = 0, r = 1e12;
    double res = 0, m = 0; 
    int cnt = 0;
    vector<int> b;
    for(int i = 0; i < 2*n; i++){
        if(s[i] == 'B') b.push_back(i);
    }
    while(r - l > 1e-3){
        m = (l+r)/2;
        segtree ac(0, n);
        double sl = 0;
        ac.u(0, 0, 0);
        int cnta = 0;
        double cur = 0;
        int funnynumber = 0;
        int cntactive = 0;
        for(int i = 0; i < 2 * n; i++){
            if(s[i] == 'A'){
                if(cntactive>0) funnynumber -= cntactive;
                cntactive++;
                if(cntactive>0) funnynumber += b[cnta] - i - cntactive;
                cnta++;
                cur += sl;
                auto tmp = ac.q(cnta); 
                tmp.first += m; tmp.second++;
                if(cnta == n) {
                    res = tmp.first + cur;
                    cnt = tmp.second;
                }
                ac.u(-cnta, tmp.first + (cnta)*cnta+funnynumber, tmp.second);
            }
            else{
                cntactive--;
                sl++;
            }
        }
        if(cnt <= k) r = m;
        else l = m;
    }
    cout<<(int)round(res-m*k)<<endl;
}

Subtask #1
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 85 ms 626516 KB Output is correct
2 Correct 87 ms 626512 KB Output is correct
3 Correct 94 ms 626568 KB Output is correct
4 Correct 91 ms 626516 KB Output is correct
5 Correct 84 ms 626392 KB Output is correct
6 Correct 87 ms 626520 KB Output is correct
7 Correct 88 ms 626564 KB Output is correct
8 Correct 85 ms 626540 KB Output is correct
9 Correct 93 ms 626512 KB Output is correct
10 Correct 87 ms 626448 KB Output is correct
11 Correct 86 ms 626512 KB Output is correct
12 Correct 89 ms 626552 KB Output is correct
13 Correct 84 ms 626512 KB Output is correct
14 Correct 84 ms 626516 KB Output is correct
15 Correct 87 ms 626516 KB Output is correct
16 Correct 88 ms 626636 KB Output is correct

Subtask #2
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 85 ms 626516 KB Output is correct
2 Correct 87 ms 626512 KB Output is correct
3 Correct 94 ms 626568 KB Output is correct
4 Correct 91 ms 626516 KB Output is correct
5 Correct 84 ms 626392 KB Output is correct
6 Correct 87 ms 626520 KB Output is correct
7 Correct 88 ms 626564 KB Output is correct
8 Correct 85 ms 626540 KB Output is correct
9 Correct 93 ms 626512 KB Output is correct
10 Correct 87 ms 626448 KB Output is correct
11 Correct 86 ms 626512 KB Output is correct
12 Correct 89 ms 626552 KB Output is correct
13 Correct 84 ms 626512 KB Output is correct
14 Correct 84 ms 626516 KB Output is correct
15 Correct 87 ms 626516 KB Output is correct
16 Correct 88 ms 626636 KB Output is correct
17 Correct 94 ms 626512 KB Output is correct
18 Correct 88 ms 626512 KB Output is correct
19 Correct 87 ms 626516 KB Output is correct
20 Correct 87 ms 626544 KB Output is correct
21 Correct 88 ms 626560 KB Output is correct
22 Correct 95 ms 626516 KB Output is correct
23 Correct 88 ms 626516 KB Output is correct
24 Correct 88 ms 626516 KB Output is correct
25 Correct 88 ms 626516 KB Output is correct
26 Correct 87 ms 626440 KB Output is correct
27 Correct 88 ms 626476 KB Output is correct
28 Correct 86 ms 626516 KB Output is correct

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 85 ms 626516 KB Output is correct
2 Correct 87 ms 626512 KB Output is correct
3 Correct 94 ms 626568 KB Output is correct
4 Correct 91 ms 626516 KB Output is correct
5 Correct 84 ms 626392 KB Output is correct
6 Correct 87 ms 626520 KB Output is correct
7 Correct 88 ms 626564 KB Output is correct
8 Correct 85 ms 626540 KB Output is correct
9 Correct 93 ms 626512 KB Output is correct
10 Correct 87 ms 626448 KB Output is correct
11 Correct 86 ms 626512 KB Output is correct
12 Correct 89 ms 626552 KB Output is correct
13 Correct 84 ms 626512 KB Output is correct
14 Correct 84 ms 626516 KB Output is correct
15 Correct 87 ms 626516 KB Output is correct
16 Correct 88 ms 626636 KB Output is correct
17 Correct 94 ms 626512 KB Output is correct
18 Correct 88 ms 626512 KB Output is correct
19 Correct 87 ms 626516 KB Output is correct
20 Correct 87 ms 626544 KB Output is correct
21 Correct 88 ms 626560 KB Output is correct
22 Correct 95 ms 626516 KB Output is correct
23 Correct 88 ms 626516 KB Output is correct
24 Correct 88 ms 626516 KB Output is correct
25 Correct 88 ms 626516 KB Output is correct
26 Correct 87 ms 626440 KB Output is correct
27 Correct 88 ms 626476 KB Output is correct
28 Correct 86 ms 626516 KB Output is correct
29 Correct 122 ms 626688 KB Output is correct
30 Incorrect 122 ms 626772 KB Output isn't correct
31 Halted 0 ms 0 KB -

Subtask #4
0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 85 ms 626516 KB Output is correct
2 Correct 87 ms 626512 KB Output is correct
3 Correct 94 ms 626568 KB Output is correct
4 Correct 91 ms 626516 KB Output is correct
5 Correct 84 ms 626392 KB Output is correct
6 Correct 87 ms 626520 KB Output is correct
7 Correct 88 ms 626564 KB Output is correct
8 Correct 85 ms 626540 KB Output is correct
9 Correct 93 ms 626512 KB Output is correct
10 Correct 87 ms 626448 KB Output is correct
11 Correct 86 ms 626512 KB Output is correct
12 Correct 89 ms 626552 KB Output is correct
13 Correct 84 ms 626512 KB Output is correct
14 Correct 84 ms 626516 KB Output is correct
15 Correct 87 ms 626516 KB Output is correct
16 Correct 88 ms 626636 KB Output is correct
17 Correct 94 ms 626512 KB Output is correct
18 Correct 88 ms 626512 KB Output is correct
19 Correct 87 ms 626516 KB Output is correct
20 Correct 87 ms 626544 KB Output is correct
21 Correct 88 ms 626560 KB Output is correct
22 Correct 95 ms 626516 KB Output is correct
23 Correct 88 ms 626516 KB Output is correct
24 Correct 88 ms 626516 KB Output is correct
25 Correct 88 ms 626516 KB Output is correct
26 Correct 87 ms 626440 KB Output is correct
27 Correct 88 ms 626476 KB Output is correct
28 Correct 86 ms 626516 KB Output is correct
29 Correct 122 ms 626688 KB Output is correct
30 Incorrect 122 ms 626772 KB Output isn't correct
31 Halted 0 ms 0 KB -

Subtask #5
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 85 ms 626516 KB Output is correct
2 Correct 87 ms 626512 KB Output is correct
3 Correct 94 ms 626568 KB Output is correct
4 Correct 91 ms 626516 KB Output is correct
5 Correct 84 ms 626392 KB Output is correct
6 Correct 87 ms 626520 KB Output is correct
7 Correct 88 ms 626564 KB Output is correct
8 Correct 85 ms 626540 KB Output is correct
9 Correct 93 ms 626512 KB Output is correct
10 Correct 87 ms 626448 KB Output is correct
11 Correct 86 ms 626512 KB Output is correct
12 Correct 89 ms 626552 KB Output is correct
13 Correct 84 ms 626512 KB Output is correct
14 Correct 84 ms 626516 KB Output is correct
15 Correct 87 ms 626516 KB Output is correct
16 Correct 88 ms 626636 KB Output is correct
17 Correct 94 ms 626512 KB Output is correct
18 Correct 88 ms 626512 KB Output is correct
19 Correct 87 ms 626516 KB Output is correct
20 Correct 87 ms 626544 KB Output is correct
21 Correct 88 ms 626560 KB Output is correct
22 Correct 95 ms 626516 KB Output is correct
23 Correct 88 ms 626516 KB Output is correct
24 Correct 88 ms 626516 KB Output is correct
25 Correct 88 ms 626516 KB Output is correct
26 Correct 87 ms 626440 KB Output is correct
27 Correct 88 ms 626476 KB Output is correct
28 Correct 86 ms 626516 KB Output is correct
29 Correct 122 ms 626688 KB Output is correct
30 Incorrect 122 ms 626772 KB Output isn't correct
31 Halted 0 ms 0 KB -