oj.uz

Submission #915725

# Submission time Handle Problem Language Result Execution time Memory
915725 2024-01-24T15:50:07 Z efedmrlr Chorus (JOI23_chorus) C++17
40 / 100
 7000 ms 432 KB 
// #pragma GCC optimize("O3,Ofast,unroll-loops")
// #pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
#include <bits/stdc++.h>

using namespace std;


#define lli long long int
#define MP make_pair
#define pb push_back
#define REP(i,n) for(int i = 0; (i) < (n); (i)++)
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()


void fastio() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
}


const double EPS = 0.00001;
const int INF = 1e9+500;
const int N = 5e2+5;
const int ALPH = 26;
const int LGN = 25;
constexpr int MOD = 1e9+7;
int n,m,q,K;
string s;
vector<int> a(1), b(1);
vector<int> acnt(2*N, 0);
lli ans = 0;
vector<int> dp, dpn;


inline void solve() {
    cin>>n>>K;
    cin>>s;
    
    for(int i = 0; i<2*n; i++) {
        acnt[i + 1] = acnt[i] + (s[i] == 'A');
        if(s[i] == 'A') {
            a.pb(i + 1);
        }
        else {
            b.pb(i + 1);
        }
    }
    
    for(int i = 1; i<=n; i++) {
        if(a[i] < b[i]) continue;
        int tmp = acnt[a[i]] - acnt[b[i]];
        ans += tmp;
    }
    s.clear(); s.pb('0');
    int cnt = 0;
    for(int i = 1; i<=n; i++) {
        while(cnt < acnt[max(a[i], b[i])]) {
            s.pb('A');
            cnt++;
        }
        s.pb('B');
    }
    a.clear(); b.clear(); a.pb(0); b.pb(0);
    // cout<<s<<"\n";
    // cout<<ans<<"\n";
    for(int i = 1; i<=2*n; i++) {
        acnt[i] = acnt[i - 1] + (s[i] == 'A');
        if(s[i] == 'A') {
            a.pb(i);
        }
        else {
            b.pb(i);
        }
    }
    // for(int i = 1; i<=n; i++) {
    //     cout<<a[i]<<" "<<b[i]<<"\n";
    // }
    dp.assign(n + 1, INF);
    dpn.assign(n + 1, INF);
    dp[0] = 0;
    for(int k = 1; k<=K; k++) {
        for(int i = 1; i<=n; i++) {
            dpn[i] = INF;
            int cost = 0;
            for(int j = i - 1; j >= 0; j--) {
                // cout<<"i:"<<i<<" j:"<<j<<" cost:"<<cost<<"\n";
                if(a[i] > b[j + 1]) {
                    cost += acnt[a[i]] - acnt[b[j + 1]];
                } 
                dpn[i] = min(dpn[i], cost + dp[j]);
            }   
        }
        swap(dp, dpn);
    }
    cout<<dp[n] + ans<<"\n";
}
 
signed main() {

    //fastio();
    int test = 1;
    //cin>>test;
    while(test--) {
        solve();
    }
    
}

Subtask #1
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 344 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct

Subtask #2
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 344 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 2 ms 348 KB Output is correct
18 Correct 16 ms 348 KB Output is correct
19 Correct 46 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 83 ms 348 KB Output is correct
23 Correct 83 ms 348 KB Output is correct
24 Correct 2 ms 348 KB Output is correct
25 Correct 83 ms 432 KB Output is correct
26 Correct 69 ms 348 KB Output is correct
27 Correct 30 ms 348 KB Output is correct
28 Correct 28 ms 348 KB Output is correct

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 344 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 2 ms 348 KB Output is correct
18 Correct 16 ms 348 KB Output is correct
19 Correct 46 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 83 ms 348 KB Output is correct
23 Correct 83 ms 348 KB Output is correct
24 Correct 2 ms 348 KB Output is correct
25 Correct 83 ms 432 KB Output is correct
26 Correct 69 ms 348 KB Output is correct
27 Correct 30 ms 348 KB Output is correct
28 Correct 28 ms 348 KB Output is correct
29 Execution timed out 7100 ms 344 KB Time limit exceeded
30 Halted 0 ms 0 KB -

Subtask #4
0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 344 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 2 ms 348 KB Output is correct
18 Correct 16 ms 348 KB Output is correct
19 Correct 46 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 83 ms 348 KB Output is correct
23 Correct 83 ms 348 KB Output is correct
24 Correct 2 ms 348 KB Output is correct
25 Correct 83 ms 432 KB Output is correct
26 Correct 69 ms 348 KB Output is correct
27 Correct 30 ms 348 KB Output is correct
28 Correct 28 ms 348 KB Output is correct
29 Execution timed out 7100 ms 344 KB Time limit exceeded
30 Halted 0 ms 0 KB -

Subtask #5
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 344 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 2 ms 348 KB Output is correct
18 Correct 16 ms 348 KB Output is correct
19 Correct 46 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 83 ms 348 KB Output is correct
23 Correct 83 ms 348 KB Output is correct
24 Correct 2 ms 348 KB Output is correct
25 Correct 83 ms 432 KB Output is correct
26 Correct 69 ms 348 KB Output is correct
27 Correct 30 ms 348 KB Output is correct
28 Correct 28 ms 348 KB Output is correct
29 Execution timed out 7100 ms 344 KB Time limit exceeded
30 Halted 0 ms 0 KB -