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답안 #318605

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
318605 2020-11-02T13:34:03 Z Lemur95 고대 책들 (IOI17_books) C++17
70 / 100
 2000 ms 136844 KB 
#include <bits/stdc++.h>
#include "books.h"
#pragma GCC optimize("Ofast")
#define x first
#define y second
#define ld long double
#define ll long long

using namespace std;

int n, s, x;

map <pair <int, int>, int> calc;

void f(int &l, int &r, vector <int> &L, vector <int> &R, vector <int> &cyc) {
  int st = min(l, min(L[cyc[l]], L[cyc[r]])), dr = max(r, max(R[cyc[l]], R[cyc[r]]));
  while(st < l || r < dr) {
    if(st < l) {
      l--;
      st = min(st, L[cyc[l]]);
      dr = max(dr, R[cyc[l]]);
    } else {
      r++;
      st = min(st, L[cyc[r]]);
      dr = max(dr, R[cyc[r]]);
    }
  }
}

int dp(int l, int r, vector <int> &L, vector <int> &R, vector <int> &cyc) {
  f(l, r, L, R, cyc);
  if(calc.find({l, r}) != calc.end())
    return calc[{l, r}];
  int ans = (int)1e9;
  int st, dr;
  if(l) {
    st = l - 1; dr = r;
    f(st, dr, L, R, cyc);
    ans = 2 + dp(st, dr, L, R, cyc);
  }
  if(r < cyc.size() - 1) {
    st = l; dr = r + 1;
    f(st, dr, L, R, cyc);
    ans = min(ans, 2 + dp(st, dr, L, R, cyc));
  }
  calc[{l, r}] = ans;
  return ans;
}

ll minimum_walk(vector <int> p, int s) {
  ll ans = 0;
  int n = p.size(), c = 0, st = s, dr = s;
  vector <int> cyc(n + 5, -1), l(n + 5), r(n + 5);
  for(int i = 0; i < n; i++) {
    ans += abs(i - p[i]);
    if(cyc[i] == -1) {
      l[c] = r[c] = i;
      int j = i;
      while(cyc[j] == -1) {
        cyc[j] = c;
        r[c] = max(r[c], j);
        j = p[j];
      }
      if(i != p[i]) {
        st = min(st, l[c]);
        dr = max(dr, r[c]);
      }
      c++;
    }
  }
  calc[{st, dr}] = 0;
  return ans + dp(s, s, l, r, cyc);
}

/*int main() {
  //ios_base :: sync_with_stdio(false);
  //cin.tie(0); cout.tie(0);
  cin >> n >> s;
  vector <int> p;
  for(int i = 1; i <= n; i++)
    cin >> x, p.push_back(x);
  cout << minimum_walk(p, s);
  return 0;
}

*/

Compilation message

books.cpp: In function 'int dp(int, int, std::vector<int>&, std::vector<int>&, std::vector<int>&)':
books.cpp:41:8: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |   if(r < cyc.size() - 1) {
      |      ~~^~~~~~~~~~~~~~~~

Subtask #1
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 0 ms 364 KB Output is correct
8 Correct 0 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 0 ms 364 KB Output is correct
11 Correct 0 ms 364 KB Output is correct
12 Correct 0 ms 364 KB Output is correct
13 Correct 0 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 0 ms 364 KB Output is correct
16 Correct 0 ms 364 KB Output is correct
17 Correct 0 ms 364 KB Output is correct
18 Correct 1 ms 364 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 0 ms 364 KB Output is correct
8 Correct 0 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 0 ms 364 KB Output is correct
11 Correct 0 ms 364 KB Output is correct
12 Correct 0 ms 364 KB Output is correct
13 Correct 0 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 0 ms 364 KB Output is correct
16 Correct 0 ms 364 KB Output is correct
17 Correct 0 ms 364 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 1 ms 364 KB Output is correct
21 Correct 1 ms 364 KB Output is correct
22 Correct 1 ms 492 KB Output is correct
23 Correct 1 ms 492 KB Output is correct
24 Correct 1 ms 364 KB Output is correct
25 Correct 1 ms 364 KB Output is correct
26 Correct 1 ms 364 KB Output is correct
27 Correct 1 ms 364 KB Output is correct
28 Correct 1 ms 364 KB Output is correct
29 Correct 1 ms 364 KB Output is correct

Subtask #3
28.0 / 28.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 0 ms 364 KB Output is correct
8 Correct 0 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 0 ms 364 KB Output is correct
11 Correct 0 ms 364 KB Output is correct
12 Correct 0 ms 364 KB Output is correct
13 Correct 0 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 0 ms 364 KB Output is correct
16 Correct 0 ms 364 KB Output is correct
17 Correct 0 ms 364 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 1 ms 364 KB Output is correct
21 Correct 1 ms 364 KB Output is correct
22 Correct 1 ms 492 KB Output is correct
23 Correct 1 ms 492 KB Output is correct
24 Correct 1 ms 364 KB Output is correct
25 Correct 1 ms 364 KB Output is correct
26 Correct 1 ms 364 KB Output is correct
27 Correct 1 ms 364 KB Output is correct
28 Correct 1 ms 364 KB Output is correct
29 Correct 1 ms 364 KB Output is correct
30 Correct 208 ms 20036 KB Output is correct
31 Correct 203 ms 19904 KB Output is correct
32 Correct 129 ms 19940 KB Output is correct
33 Correct 386 ms 136844 KB Output is correct
34 Correct 377 ms 136804 KB Output is correct
35 Correct 316 ms 105060 KB Output is correct
36 Correct 186 ms 49636 KB Output is correct
37 Correct 137 ms 27876 KB Output is correct
38 Correct 139 ms 26848 KB Output is correct
39 Correct 152 ms 26724 KB Output is correct
40 Correct 138 ms 26596 KB Output is correct
41 Correct 160 ms 26724 KB Output is correct
42 Correct 149 ms 26596 KB Output is correct
43 Correct 139 ms 26596 KB Output is correct

Subtask #4
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 47 ms 7012 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 16 ms 2796 KB Output is correct
4 Correct 43 ms 6628 KB Output is correct
5 Correct 43 ms 6632 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 492 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 3 ms 748 KB Output is correct
12 Correct 3 ms 876 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 1 ms 364 KB Output is correct
17 Correct 1 ms 492 KB Output is correct
18 Correct 1 ms 492 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 1 ms 364 KB Output is correct

Subtask #5
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 0 ms 364 KB Output is correct
8 Correct 0 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 0 ms 364 KB Output is correct
11 Correct 0 ms 364 KB Output is correct
12 Correct 0 ms 364 KB Output is correct
13 Correct 0 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 0 ms 364 KB Output is correct
16 Correct 0 ms 364 KB Output is correct
17 Correct 0 ms 364 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 1 ms 364 KB Output is correct
21 Correct 1 ms 364 KB Output is correct
22 Correct 1 ms 492 KB Output is correct
23 Correct 1 ms 492 KB Output is correct
24 Correct 1 ms 364 KB Output is correct
25 Correct 1 ms 364 KB Output is correct
26 Correct 1 ms 364 KB Output is correct
27 Correct 1 ms 364 KB Output is correct
28 Correct 1 ms 364 KB Output is correct
29 Correct 1 ms 364 KB Output is correct
30 Correct 208 ms 20036 KB Output is correct
31 Correct 203 ms 19904 KB Output is correct
32 Correct 129 ms 19940 KB Output is correct
33 Correct 386 ms 136844 KB Output is correct
34 Correct 377 ms 136804 KB Output is correct
35 Correct 316 ms 105060 KB Output is correct
36 Correct 186 ms 49636 KB Output is correct
37 Correct 137 ms 27876 KB Output is correct
38 Correct 139 ms 26848 KB Output is correct
39 Correct 152 ms 26724 KB Output is correct
40 Correct 138 ms 26596 KB Output is correct
41 Correct 160 ms 26724 KB Output is correct
42 Correct 149 ms 26596 KB Output is correct
43 Correct 139 ms 26596 KB Output is correct
44 Correct 47 ms 7012 KB Output is correct
45 Correct 1 ms 364 KB Output is correct
46 Correct 16 ms 2796 KB Output is correct
47 Correct 43 ms 6628 KB Output is correct
48 Correct 43 ms 6632 KB Output is correct
49 Correct 1 ms 364 KB Output is correct
50 Correct 1 ms 492 KB Output is correct
51 Correct 1 ms 364 KB Output is correct
52 Correct 1 ms 364 KB Output is correct
53 Correct 1 ms 364 KB Output is correct
54 Correct 3 ms 748 KB Output is correct
55 Correct 3 ms 876 KB Output is correct
56 Correct 1 ms 364 KB Output is correct
57 Correct 1 ms 364 KB Output is correct
58 Correct 1 ms 364 KB Output is correct
59 Correct 1 ms 364 KB Output is correct
60 Correct 1 ms 492 KB Output is correct
61 Correct 1 ms 492 KB Output is correct
62 Correct 1 ms 364 KB Output is correct
63 Correct 1 ms 364 KB Output is correct
64 Execution timed out 2078 ms 26852 KB Time limit exceeded
65 Halted 0 ms 0 KB -