oj.uz

Submission #748093

# Submission time Handle Problem Language Result Execution time Memory
748093 2023-05-25T11:49:37 Z Sam_a17 Group Photo (JOI21_ho_t3) C++17
64 / 100
 5000 ms 392432 KB 
#define _CRT_SECURE_NO_WARNINGS
#include <bits/stdc++.h>
//#include "temp.cpp"
#include <cstdio>
using namespace std;
 
#ifndef ONLINE_JUDGE
#define dbg(x) cerr << #x <<" "; print(x); cerr << endl;
#else
#define dbg(x)
#endif
 
#define sz(x) (int((x).size()))
#define len(x) (int)x.length()
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define clr(x) (x).clear()
#define uniq(x) x.resize(unique(all(x)) - x.begin());
 
#define pb push_back
#define popf pop_front
#define popb pop_back
 
void print(long long t) {cerr << t;}
void print(int t) {cerr << t;}
void print(string t) {cerr << t;}
void print(char t) {cerr << t;}
void print(double t) {cerr << t;}
void print(long double t) {cerr << t;}
void print(unsigned long long t) {cerr << t;}
 
template <class T, class V> void print(pair <T, V> p);
template <class T> void print(vector <T> v);
template <class T> void print(set <T> v);
template <class T, class V> void print(map <T, V> v);
template <class T> void print(multiset <T> v);
template <class T> void print(T v[],T n) {cerr << "["; for(int i = 0; i < n; i++) {cerr << v[i] << " ";} cerr << "]";}
template <class T, class V> void print(pair <T, V> p) {cerr << "{"; print(p.first); cerr << ","; print(p.second); cerr << "}";}
template <class T> void print(vector <T> v) {cerr << "[ "; for (T i : v) {print(i); cerr << " ";} cerr << "]";}
template <class T> void print(deque <T> v) {cerr << "[ "; for (T i : v) {print(i); cerr << " ";} cerr << "]";}
template <class T> void print(set <T> v) {cerr << "[ "; for (T i : v) {print(i); cerr << " ";} cerr << "]";}
template <class T> void print(multiset <T> v) {cerr << "[ "; for (T i : v) {print(i); cerr << " ";} cerr << "]";}
template <class T, class V> void print(map <T, V> v) {cerr << "[ "; for (auto i : v) {print(i); cerr << " ";} cerr << "]";}
 
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
#define nl '\n'
 
// for random generations
mt19937 myrand(chrono::steady_clock::now().time_since_epoch().count());
// mt19937 myrand(131);

// for grid problems
int dx[8] = {-1,0,1,0,1,-1,1,-1};
int dy[8] = {0,1,0,-1,1,1,-1,-1};
 
// lowest / (1 << 17) >= 1e5 / (1 << 18) >= 2e5 / (1 << 21) >= 1e6
void fastIO() {
  ios_base::sync_with_stdio(false);
  cin.tie(nullptr); cout.tie(nullptr);
}
// file in/out
void setIO(string str = "") {
  fastIO();
 
  if (str != "") {
    freopen((str + ".in").c_str(), "r", stdin);
    freopen((str + ".out").c_str(), "w", stdout);
  }
}
// Indexed Set
template <class T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
const int N = 5005;

// bit
struct fenwick {
  int size;
  vector<long long> tree; 

  void init(int size_) {
    tree.assign(size_ + 2, 0);
    size = size_;
  }

  void upd(int u, long long v) {
    while(u <= size) {
      tree[u] += v;
      u += u & (-u);
    }
  }

  long long qry(int u) {
    long long sum = 0;
    while(u > 0) {
      sum += tree[u];
      u -= u & (-u); // lsb
    }
    return sum;
  }

  long long sum(int l, int r) {
    return qry(r) - qry(l - 1);
  }

};

int n, pos[N];

int get(vector<int>& a, vector<int>& b) {
  fenwick ft;
  ft.init(n + 1);

  int ans = 0;
  for(int i = 0; i < n; i++) {
    int wh = pos[b[i]];
    ans += wh - 1 - ft.qry(wh);
    ft.upd(wh, 1);
  }

  return ans;
}

int dp[N];

int rec(int to) {
  if(to == 0) {
    return 0;
  }

  if(dp[to] != -1) {
    return dp[to];
  }

  int maxi = n - (n - to);

  fenwick ft;
  ft.init(n + 1);
  for(int i = maxi + 1; i <= n; i++) {
    ft.upd(pos[i], 1);
  }

  int put = n * n;
  for(int i = to; i >= 1; i--) {
    fenwick nft = ft;

    int nd = to - i;
    int cur = maxi - nd, sm = 0;
    
    for(int j = to; j >= i; j--, cur++) {
      int suf = n - pos[cur];
      suf -= nft.sum(pos[cur], n);
      nft.upd(pos[cur], 1);
      sm += suf;
    }
    put = min(put, sm + rec(i - 1));
  }

  dp[to] = put;
  return dp[to];
}

void solve_() {
  cin >> n;
  vector<int> a(n);

  for(int i = 0; i < n; i++) {
    cin >> a[i];
    pos[a[i]] = i + 1;
  }

  // int ans = n * n;
  // for(int i = 1; i < (1 << n); i++) {
  //   if(!(i & 1)) continue;

  //   vector<int> b(n);
  //   int it = n, lst = n - 1;

  //   for(int j = n - 1; j >= 0; j--) {
  //     if(i & (1 << j)) {
  //       b[j] = it;
  //       it -= (lst - j + 1);
  //       lst = j - 1;
  //     }
  //   }

  //   for(int j = 0; j < n; j++) {
  //     if(b[j]) continue;
  //     b[j] = b[j - 1] - 1;
  //   }

  //   ans = min(ans, get(a, b));
  // }


  for(int i = 0; i <= n; i++) {
    dp[i] = -1;
  }

  cout << rec(n) << '\n';
}

int main() {
  setIO();
  
  auto solve = [&](int test_case)-> void {
    while(test_case--) {
      solve_();
    }

  };
 
  int test_cases = 1; 
  // cin >> test_cases;
  solve(test_cases);
 
  return 0;
}

Compilation message

Main.cpp: In function 'void setIO(std::string)':
Main.cpp:67:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   67 |     freopen((str + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:68:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   68 |     freopen((str + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct

Subtask #3
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 26 ms 980 KB Output is correct
22 Correct 27 ms 968 KB Output is correct
23 Correct 24 ms 980 KB Output is correct
24 Correct 23 ms 972 KB Output is correct
25 Correct 21 ms 968 KB Output is correct
26 Correct 22 ms 972 KB Output is correct
27 Correct 22 ms 976 KB Output is correct
28 Correct 22 ms 972 KB Output is correct
29 Correct 24 ms 972 KB Output is correct
30 Correct 24 ms 972 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 26 ms 980 KB Output is correct
22 Correct 27 ms 968 KB Output is correct
23 Correct 24 ms 980 KB Output is correct
24 Correct 23 ms 972 KB Output is correct
25 Correct 21 ms 968 KB Output is correct
26 Correct 22 ms 972 KB Output is correct
27 Correct 22 ms 976 KB Output is correct
28 Correct 22 ms 972 KB Output is correct
29 Correct 24 ms 972 KB Output is correct
30 Correct 24 ms 972 KB Output is correct
31 Correct 1684 ms 10452 KB Output is correct
32 Correct 1635 ms 10452 KB Output is correct
33 Correct 1599 ms 10452 KB Output is correct
34 Correct 1370 ms 10464 KB Output is correct
35 Correct 1400 ms 10452 KB Output is correct
36 Correct 1380 ms 10452 KB Output is correct
37 Correct 1362 ms 10452 KB Output is correct
38 Correct 1399 ms 10452 KB Output is correct
39 Correct 1415 ms 10452 KB Output is correct
40 Correct 1376 ms 10452 KB Output is correct

Subtask #5
0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 26 ms 980 KB Output is correct
22 Correct 27 ms 968 KB Output is correct
23 Correct 24 ms 980 KB Output is correct
24 Correct 23 ms 972 KB Output is correct
25 Correct 21 ms 968 KB Output is correct
26 Correct 22 ms 972 KB Output is correct
27 Correct 22 ms 976 KB Output is correct
28 Correct 22 ms 972 KB Output is correct
29 Correct 24 ms 972 KB Output is correct
30 Correct 24 ms 972 KB Output is correct
31 Correct 1684 ms 10452 KB Output is correct
32 Correct 1635 ms 10452 KB Output is correct
33 Correct 1599 ms 10452 KB Output is correct
34 Correct 1370 ms 10464 KB Output is correct
35 Correct 1400 ms 10452 KB Output is correct
36 Correct 1380 ms 10452 KB Output is correct
37 Correct 1362 ms 10452 KB Output is correct
38 Correct 1399 ms 10452 KB Output is correct
39 Correct 1415 ms 10452 KB Output is correct
40 Correct 1376 ms 10452 KB Output is correct
41 Execution timed out 5069 ms 392432 KB Time limit exceeded
42 Halted 0 ms 0 KB -