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Submission #653129

# Submission time Handle Problem Language Result Execution time Memory
653129 2022-10-25T19:05:46 Z pauloamed JJOOII 2 (JOI20_ho_t2) C++14
100 / 100
 58 ms 3316 KB 
#include<bits/stdc++.h>
using namespace std;

const int MAXN = 200010;

int J[MAXN], O[MAXN], I[MAXN];
int N, K;
string s;

int bb(int v[], int x){
  // achar ultimo cara i, v[i] < x
  if(v[0] >= x) return 0;
  int ans = 0;
  int pot = (1 << 30);
  while(pot){
    int mans = ans + pot;
    if(mans < N && v[mans] < x) ans = mans;
    pot /= 2;
  }
  if(ans + 1 == N) return -1;
  else return ans + 1;
}

int solveI(int i){
  if(i == N) return -1;
  int prev = I[i - 1];

  int nxt = bb(I, prev + K);
  if(nxt == -1) return -1;
  int cost = (nxt - i + 1) - K;
  return cost;
}

int solveO(int i){
  if(i == N) return -1;
  int prev = O[i - 1];

  int nxt = bb(O, prev + K);
  if(nxt == -1) return -1;
  int cost = (nxt - i + 1) - K;
  int x; 
  if((x = solveI(nxt + 1)) == -1) return -1;
  return cost + x;
}

int solveJ(int i){ // starting from i
  int prev = 0;
  if(i > 0) prev = J[i - 1];

  int nxt = bb(J, prev + K);
  if(nxt == -1) return -1;
  int cost = (nxt - i + 1) - K;
  int x; 
  if((x = solveO(nxt + 1)) == -1) return -1;
  return cost + x;
}

int32_t main(){
  cin.tie(NULL)->sync_with_stdio(false);
  cin >> N >> K;
  cin >> s;

  for(int i = 0; i < N; ++i){
    J[i] = (s[i] == 'J');
    O[i] = (s[i] == 'O');
    I[i] = (s[i] == 'I');
    if(i){
      J[i] += J[i - 1];
      O[i] += O[i - 1];
      I[i] += I[i - 1];
    }
  }

  int ans = INT_MAX;
  for(int i = 0; i < N; ++i){
    int x = solveJ(i);
    if(x == -1) break;
    // cout << i << " " << x << "\n";
    ans = min(ans, x);
  }
  cout << ((ans == INT_MAX)? -1 : ans) << "\n";
}

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 332 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 328 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 1 ms 328 KB Output is correct
13 Correct 1 ms 328 KB Output is correct
14 Correct 1 ms 340 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 332 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 328 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 1 ms 328 KB Output is correct
13 Correct 1 ms 328 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 320 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 0 ms 340 KB Output is correct
23 Correct 0 ms 340 KB Output is correct
24 Correct 0 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 0 ms 340 KB Output is correct
27 Correct 1 ms 332 KB Output is correct
28 Correct 1 ms 420 KB Output is correct
29 Correct 1 ms 340 KB Output is correct
30 Correct 1 ms 340 KB Output is correct
31 Correct 1 ms 340 KB Output is correct
32 Correct 1 ms 340 KB Output is correct
33 Correct 1 ms 340 KB Output is correct
34 Correct 0 ms 340 KB Output is correct
35 Correct 1 ms 324 KB Output is correct

Subtask #3
87.0 / 87.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 332 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 328 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 1 ms 328 KB Output is correct
13 Correct 1 ms 328 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 320 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 0 ms 340 KB Output is correct
23 Correct 0 ms 340 KB Output is correct
24 Correct 0 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 0 ms 340 KB Output is correct
27 Correct 1 ms 332 KB Output is correct
28 Correct 1 ms 420 KB Output is correct
29 Correct 1 ms 340 KB Output is correct
30 Correct 1 ms 340 KB Output is correct
31 Correct 1 ms 340 KB Output is correct
32 Correct 1 ms 340 KB Output is correct
33 Correct 1 ms 340 KB Output is correct
34 Correct 0 ms 340 KB Output is correct
35 Correct 1 ms 324 KB Output is correct
36 Correct 47 ms 2912 KB Output is correct
37 Correct 55 ms 3168 KB Output is correct
38 Correct 55 ms 3316 KB Output is correct
39 Correct 48 ms 3168 KB Output is correct
40 Correct 14 ms 3148 KB Output is correct
41 Correct 38 ms 3168 KB Output is correct
42 Correct 58 ms 3168 KB Output is correct
43 Correct 2 ms 2132 KB Output is correct
44 Correct 2 ms 2528 KB Output is correct
45 Correct 3 ms 3100 KB Output is correct
46 Correct 2 ms 3192 KB Output is correct
47 Correct 2 ms 3168 KB Output is correct
48 Correct 4 ms 3168 KB Output is correct
49 Correct 2 ms 2272 KB Output is correct
50 Correct 3 ms 3168 KB Output is correct
51 Correct 2 ms 3168 KB Output is correct
52 Correct 2 ms 3044 KB Output is correct
53 Correct 3 ms 3160 KB Output is correct
54 Correct 20 ms 3168 KB Output is correct
55 Correct 8 ms 3196 KB Output is correct
56 Correct 2 ms 3148 KB Output is correct