oj.uz

Submission #321291

# Submission time Handle Problem Language Result Execution time Memory
321291 2020-11-11T23:22:30 Z VROOM_VARUN Ancient Books (IOI17_books) C++14
100 / 100
 225 ms 26724 KB 
/*
ID: varunra2
LANG: C++
TASK: books
*/

#include <bits/stdc++.h>
using namespace std;

#ifdef DEBUG
#include "lib/debug.h"
#define debug(...) cerr << "[" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__)
#define debug_arr(...) \
  cerr << "[" << #__VA_ARGS__ << "]:", debug_arr(__VA_ARGS__)
#pragma GCC diagnostic ignored "-Wsign-compare"
//#pragma GCC diagnostic ignored "-Wunused-parameter"
//#pragma GCC diagnostic ignored "-Wunused-variable"
#else
#define debug(...) 42
#endif

#define EPS 1e-9
#define IN(A, B, C) assert(B <= A && A <= C)
#define INF (int)1e9
#define MEM(a, b) memset(a, (b), sizeof(a))
#define MOD 1000000007
#define MP make_pair
#define PB push_back
#define all(cont) cont.begin(), cont.end()
#define rall(cont) cont.end(), cont.begin()
#define x first
#define y second

const double PI = acos(-1.0);
typedef long long ll;
typedef long double ld;
typedef pair<int, int> PII;
typedef map<int, int> MPII;
typedef multiset<int> MSETI;
typedef set<int> SETI;
typedef set<string> SETS;
typedef vector<int> VI;
typedef vector<PII> VII;
typedef vector<VI> VVI;
typedef vector<string> VS;

#define rep(i, a, b) for (int i = a; i < (b); ++i)
#define trav(a, x) for (auto& a : x)
#define sz(x) (int)(x).size()
typedef pair<int, int> pii;
typedef vector<int> vi;
#pragma GCC diagnostic ignored "-Wsign-compare"
// util functions

int s;
int n;
int targl, targr;
int cycs = 0;
VI wcyc;
VI lcyc;
VI rcyc;
ll retgood = 0;
ll retbad = 0;

void init(VI& order) {
  n = sz(order);
  targl = s;
  targr = s;
  wcyc.assign(n, -1);
  lcyc.resize(n);
  rcyc.resize(n);
}

void extend(int& l, int& r) {
  // can we move l or r?
  int nl, nr;
  nl = min(lcyc[wcyc[l]], lcyc[wcyc[r]]);
  nr = max(rcyc[wcyc[l]], rcyc[wcyc[r]]);

  while (nl < l or nr > r) {
    if (l > nl) {
      l--;
      nl = min(nl, lcyc[wcyc[l]]);
      nr = max(nr, rcyc[wcyc[l]]);
    } else {
      r++;
      nl = min(nl, lcyc[wcyc[r]]);
      nr = max(nr, rcyc[wcyc[r]]);
    }
  }
}

ll solve() {
  int l = s, r = s;
  do {
    debug(l, r, targl, targr);
    // debug(l, r, targl, targr);
    extend(l, r);
    // debug(l, r, targl, targr);

    int costl = 0, costr = 0, ll = l, lr = r, rl = l, rr = r;
    bool next1 = false;
    bool next2 = false;
    while (true) {
      if (ll <= targl) break;
      ll--;
      extend(ll, lr);
      costl += 2;
      if (lr > r) {
        next1 = true;
        break;
      }
    }

    while (true) {
      if (rr >= targr) break;
      rr++;
      extend(rl, rr);
      costr += 2;
      if (rl < l) {
        next2 = true;
        break;
      }
    }

    assert(next1 == next2);

    if (next1 and next2)
      retbad += min(costl, costr);
    else
      retbad += (costl + costr);

    l = min(ll, rl);
    r = max(rr, lr);
    debug(l, r, targl, targr);
    debug(costl, costr);
  } while (l > targl or r < targr);
  debug(retbad);
  return retbad;
}

ll minimum_walk(VI order, int s) {
  ::s = s;
  init(order);
  for (int i = 0; i < n; i++) {
    retgood += abs(i - order[i]);
    if (wcyc[i] != -1) continue;
    int pos = i;
    lcyc[cycs] = i;
    rcyc[cycs] = i;
    do {
      wcyc[pos] = cycs;
      rcyc[cycs] = max(rcyc[cycs], pos);
      pos = order[pos];
    } while (pos != i);
    if (i != order[i]) {
      targl = min(targl, lcyc[cycs]);
      targr = max(targr, rcyc[cycs]);
    }
    cycs++;
  }
  debug(retgood);
  return retgood + solve();
}

// int main() {
// #ifndef ONLINE_JUDGE
//   freopen("books.in", "r", stdin);
//   freopen("books.out", "w", stdout);
// #endif
//   cin.sync_with_stdio(0);
//   cin.tie(0);

//   int n, s;
//   cin >> n >> s;
//   VI order(n);

//   for (int i = 0; i < n; i++) {
//     cin >> order[i];
//   }

//   cout << minimum_walk(order, s) << '\n';

//   return 0;
// }

Compilation message

books.cpp: In function 'll solve()':
books.cpp:19:20: warning: statement has no effect [-Wunused-value]
   19 | #define debug(...) 42
      |                    ^~
books.cpp:96:5: note: in expansion of macro 'debug'
   96 |     debug(l, r, targl, targr);
      |     ^~~~~
books.cpp:19:20: warning: statement has no effect [-Wunused-value]
   19 | #define debug(...) 42
      |                    ^~
books.cpp:135:5: note: in expansion of macro 'debug'
  135 |     debug(l, r, targl, targr);
      |     ^~~~~
books.cpp:19:20: warning: statement has no effect [-Wunused-value]
   19 | #define debug(...) 42
      |                    ^~
books.cpp:136:5: note: in expansion of macro 'debug'
  136 |     debug(costl, costr);
      |     ^~~~~
books.cpp:19:20: warning: statement has no effect [-Wunused-value]
   19 | #define debug(...) 42
      |                    ^~
books.cpp:138:3: note: in expansion of macro 'debug'
  138 |   debug(retbad);
      |   ^~~~~
books.cpp: In function 'll minimum_walk(VI, int)':
books.cpp:19:20: warning: statement has no effect [-Wunused-value]
   19 | #define debug(...) 42
      |                    ^~
books.cpp:162:3: note: in expansion of macro 'debug'
  162 |   debug(retgood);
      |   ^~~~~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 512 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 384 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Correct 0 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 492 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 1 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 0 ms 364 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 512 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 384 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Correct 0 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 492 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 1 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 0 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 1 ms 384 KB Output is correct
21 Correct 1 ms 364 KB Output is correct
22 Correct 1 ms 364 KB Output is correct
23 Correct 1 ms 384 KB Output is correct
24 Correct 1 ms 384 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

# Verdict Execution time Memory Grader output
1 Correct 1 ms 512 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 384 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Correct 0 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 492 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 1 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 0 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 1 ms 384 KB Output is correct
21 Correct 1 ms 364 KB Output is correct
22 Correct 1 ms 364 KB Output is correct
23 Correct 1 ms 384 KB Output is correct
24 Correct 1 ms 384 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 225 ms 19940 KB Output is correct
31 Correct 224 ms 20036 KB Output is correct
32 Correct 152 ms 19940 KB Output is correct
33 Correct 164 ms 19928 KB Output is correct
34 Correct 164 ms 19940 KB Output is correct
35 Correct 167 ms 19940 KB Output is correct
36 Correct 154 ms 19940 KB Output is correct
37 Correct 149 ms 19940 KB Output is correct
38 Correct 148 ms 19940 KB Output is correct
39 Correct 150 ms 19944 KB Output is correct
40 Correct 160 ms 19940 KB Output is correct
41 Correct 172 ms 19940 KB Output is correct
42 Correct 166 ms 19936 KB Output is correct
43 Correct 157 ms 19940 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 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 1 ms 364 KB Output is correct
12 Correct 1 ms 364 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 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

Subtask #5
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 512 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 384 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Correct 0 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 492 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 1 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 0 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 1 ms 384 KB Output is correct
21 Correct 1 ms 364 KB Output is correct
22 Correct 1 ms 364 KB Output is correct
23 Correct 1 ms 384 KB Output is correct
24 Correct 1 ms 384 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 225 ms 19940 KB Output is correct
31 Correct 224 ms 20036 KB Output is correct
32 Correct 152 ms 19940 KB Output is correct
33 Correct 164 ms 19928 KB Output is correct
34 Correct 164 ms 19940 KB Output is correct
35 Correct 167 ms 19940 KB Output is correct
36 Correct 154 ms 19940 KB Output is correct
37 Correct 149 ms 19940 KB Output is correct
38 Correct 148 ms 19940 KB Output is correct
39 Correct 150 ms 19944 KB Output is correct
40 Correct 160 ms 19940 KB Output is correct
41 Correct 172 ms 19940 KB Output is correct
42 Correct 166 ms 19936 KB Output is correct
43 Correct 157 ms 19940 KB Output is correct
44 Correct 1 ms 364 KB Output is correct
45 Correct 1 ms 364 KB Output is correct
46 Correct 1 ms 364 KB Output is correct
47 Correct 1 ms 364 KB Output is correct
48 Correct 1 ms 364 KB Output is correct
49 Correct 1 ms 364 KB Output is correct
50 Correct 1 ms 364 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 1 ms 364 KB Output is correct
55 Correct 1 ms 364 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 364 KB Output is correct
61 Correct 1 ms 364 KB Output is correct
62 Correct 1 ms 364 KB Output is correct
63 Correct 1 ms 364 KB Output is correct
64 Correct 170 ms 26616 KB Output is correct
65 Correct 158 ms 26596 KB Output is correct
66 Correct 154 ms 26596 KB Output is correct
67 Correct 169 ms 26724 KB Output is correct
68 Correct 15 ms 2924 KB Output is correct
69 Correct 17 ms 3052 KB Output is correct
70 Correct 15 ms 2924 KB Output is correct
71 Correct 16 ms 2924 KB Output is correct
72 Correct 19 ms 2924 KB Output is correct
73 Correct 17 ms 2924 KB Output is correct
74 Correct 162 ms 26596 KB Output is correct
75 Correct 171 ms 26596 KB Output is correct
76 Correct 161 ms 26596 KB Output is correct
77 Correct 163 ms 26596 KB Output is correct
78 Correct 159 ms 26596 KB Output is correct
79 Correct 166 ms 26596 KB Output is correct
80 Correct 156 ms 26596 KB Output is correct
81 Correct 167 ms 26724 KB Output is correct
82 Correct 162 ms 26596 KB Output is correct
83 Correct 161 ms 26724 KB Output is correct
84 Correct 160 ms 26724 KB Output is correct
85 Correct 162 ms 26720 KB Output is correct
86 Correct 153 ms 26596 KB Output is correct
87 Correct 169 ms 26596 KB Output is correct
88 Correct 169 ms 26596 KB Output is correct
89 Correct 164 ms 26596 KB Output is correct
90 Correct 157 ms 26724 KB Output is correct
91 Correct 161 ms 26724 KB Output is correct
92 Correct 160 ms 26596 KB Output is correct