oj.uz

Submission #503844

# Submission time Handle Problem Language Result Execution time Memory
503844 2022-01-09T04:12:21 Z cig32 JJOOII 2 (JOI20_ho_t2) C++17
100 / 100
 31 ms 5520 KB 
#pragma GCC optimize("Ofast")
#include <bits/stdc++.h>
using namespace std;
mt19937_64 rng((int)std::chrono::steady_clock::now().time_since_epoch().count());
const int MAXN = 3e5 + 10;
const int MOD = 1e9 + 7;
#define int long long

int rnd(int x, int y) { // random number generator
  int u= uniform_int_distribution<int>(x, y)(rng); return u;
}

void solve(int tc) {
  int n, k;
  cin >> n >> k;
  string s;
  cin >> s;
  int freq[n+1][3];
  for(int i=0; i<3; i++) freq[0][i] = 0;
  for(int i=0; i<n; i++) s[i] = (s[i] == 'J' ? '0' : (s[i] == 'O' ? '1' : '2'));
  for(int i=1; i<=n; i++) {
    for(int j=0; j<3; j++) {
      freq[i][j] = freq[i-1][j] + (s[i-1] == j + '0');
    }
  }
  int ans = 1e18;
  for(int i=1; i<=n; i++) {
    bool valid = 1;
    int lb = i, rb = n;
    while(lb<rb) {
      int mid = (lb+rb) >> 1;
      if(freq[mid][0] - freq[i-1][0] >= k) rb = mid;
      else lb = mid+1;
    }
    valid &= (freq[lb][0] - freq[i-1][0] == k);
    rb = n;
    int sto = lb;
    lb++;
    while(lb<rb) {
      int mid = (lb+rb) >> 1;
      if(freq[mid][1] - freq[sto][1] >= k) rb = mid;
      else lb = mid+1;
    }
    valid &= (freq[lb][1] - freq[sto][1] == k);
    rb = n;
    sto = lb;
    lb++;
    while(lb<rb) {
      int mid = (lb+rb) >> 1;
      if(freq[mid][2] - freq[sto][2] >= k) rb = mid;
      else lb = mid+1;
    }
    valid &= (freq[lb][2] - freq[sto][2] == k);
    if(valid) ans = min(ans, lb-i + 1 - 3*k);
  }
  cout << (ans == 1e18? -1 : ans);
}

int32_t main(){
  ios::sync_with_stdio(0); cin.tie(0);
  int t = 1; //cin >> t;
  for(int i=1; i<=t; i++) solve(i);
}

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 1 ms 316 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 316 KB Output is correct
9 Correct 0 ms 316 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 1 ms 320 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 0 ms 204 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 1 ms 316 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 316 KB Output is correct
9 Correct 0 ms 316 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 1 ms 320 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 0 ms 204 KB Output is correct
15 Correct 1 ms 316 KB Output is correct
16 Correct 1 ms 316 KB Output is correct
17 Correct 1 ms 308 KB Output is correct
18 Correct 1 ms 332 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 1 ms 316 KB Output is correct
21 Correct 1 ms 316 KB Output is correct
22 Correct 1 ms 316 KB Output is correct
23 Correct 1 ms 296 KB Output is correct
24 Correct 1 ms 324 KB Output is correct
25 Correct 1 ms 324 KB Output is correct
26 Correct 1 ms 332 KB Output is correct
27 Correct 1 ms 332 KB Output is correct
28 Correct 0 ms 332 KB Output is correct
29 Correct 1 ms 320 KB Output is correct
30 Correct 1 ms 312 KB Output is correct
31 Correct 0 ms 332 KB Output is correct
32 Correct 1 ms 332 KB Output is correct
33 Correct 1 ms 316 KB Output is correct
34 Correct 0 ms 312 KB Output is correct
35 Correct 1 ms 312 KB Output is correct

Subtask #3
87.0 / 87.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 1 ms 316 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 316 KB Output is correct
9 Correct 0 ms 316 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 1 ms 320 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 0 ms 204 KB Output is correct
15 Correct 1 ms 316 KB Output is correct
16 Correct 1 ms 316 KB Output is correct
17 Correct 1 ms 308 KB Output is correct
18 Correct 1 ms 332 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 1 ms 316 KB Output is correct
21 Correct 1 ms 316 KB Output is correct
22 Correct 1 ms 316 KB Output is correct
23 Correct 1 ms 296 KB Output is correct
24 Correct 1 ms 324 KB Output is correct
25 Correct 1 ms 324 KB Output is correct
26 Correct 1 ms 332 KB Output is correct
27 Correct 1 ms 332 KB Output is correct
28 Correct 0 ms 332 KB Output is correct
29 Correct 1 ms 320 KB Output is correct
30 Correct 1 ms 312 KB Output is correct
31 Correct 0 ms 332 KB Output is correct
32 Correct 1 ms 332 KB Output is correct
33 Correct 1 ms 316 KB Output is correct
34 Correct 0 ms 312 KB Output is correct
35 Correct 1 ms 312 KB Output is correct
36 Correct 19 ms 5088 KB Output is correct
37 Correct 20 ms 5456 KB Output is correct
38 Correct 19 ms 5520 KB Output is correct
39 Correct 24 ms 5480 KB Output is correct
40 Correct 19 ms 5464 KB Output is correct
41 Correct 24 ms 5464 KB Output is correct
42 Correct 31 ms 5464 KB Output is correct
43 Correct 12 ms 3532 KB Output is correct
44 Correct 13 ms 4312 KB Output is correct
45 Correct 18 ms 5464 KB Output is correct
46 Correct 23 ms 5452 KB Output is correct
47 Correct 18 ms 5440 KB Output is correct
48 Correct 18 ms 5464 KB Output is correct
49 Correct 12 ms 3792 KB Output is correct
50 Correct 27 ms 5464 KB Output is correct
51 Correct 18 ms 5464 KB Output is correct
52 Correct 18 ms 5220 KB Output is correct
53 Correct 14 ms 5484 KB Output is correct
54 Correct 22 ms 5464 KB Output is correct
55 Correct 12 ms 5436 KB Output is correct
56 Correct 16 ms 5420 KB Output is correct