oj.uz

Submission #1077534

# Submission time Handle Problem Language Result Execution time Memory
1077534 2024-08-27T07:54:48 Z bleahbleah Tricks of the Trade (CEOI23_trade) C++17
10 / 100
 8000 ms 33568 KB 
#include <bits/stdc++.h>
#define all(x) (x).begin(),(x).end()
using namespace std;
 
using ll = long long;
using ld = long double;
 
#define int ll
#define sz(x) ((int)(x).size())
 
using pii = pair<int,int>;
using tii = tuple<int,int,int>;
 
const int nmax = 25e4 + 5;
 
int K;
 
const ll inf = 1e18;
 
struct KthHeap {
   multiset<int> outside, inside;
   void repair() {
      while(sz(inside) > K) {
         int x = *inside.begin();
         inside.erase(inside.find(x));
         outside.insert(x);
         sum -= x;
      }
      while(sz(inside) < K && sz(outside)) {
         int x = *outside.rbegin();
         outside.erase(outside.find(x));
         inside.insert(x);
         sum += x;
      }
      while(sz(inside) && sz(outside) && *inside.begin() < *outside.rbegin()) {
         int x = *outside.rbegin(), y = *inside.begin();
         outside.erase(outside.find(x));
         inside.erase(inside.find(y));
         outside.emplace(y);
         inside.emplace(x);
         sum += x - y;
      }
      return;
   }
   void erase(int x) {
      if(outside.find(x) != outside.end())
         outside.erase(outside.find(x));
      else if(inside.find(x) != inside.end())
         inside.erase(inside.find(x)), sum -= x;
      else assert(false);
      repair();
   }
   void insert(int x) {
      outside.emplace(x);
      repair();
   }
   ll query() {
      repair();
      if(sz(inside) < K) return -inf;
      return sum;
   }
   
   private:
      ll sum = 0;
};
 
int bestcut[nmax];
ll dp[nmax];
 
ll spart[nmax];
ll v[nmax];
 
ll S(int l, int r) { return spart[r] - spart[l - 1]; }
 
namespace Divide {
   KthHeap hint;
   
   void divide(int l, int r) {
      if(l + 1 == r) return;
      int optl = bestcut[l], optr = bestcut[r];
      
      int mid = l + r >> 1;
      if(r <= optl) {
         for(int i = mid; i < r; i++) hint.insert(v[i]);
         ll best = hint.query() - S(mid, optl);
         int atr = optl;
         for(int i = optl + 1; i <= optr; i++) {
            hint.insert(v[i]);
            if(hint.query() - S(mid, i) >= best) tie(best, atr) = make_pair(hint.query() - S(mid, i), i);
         }
         bestcut[mid] = atr, dp[mid] = best;
         if(atr - mid + 1 == K) {
            int SA = S(mid, atr), SB = 0;
            for(int i = mid; i <= atr; i++) SB += v[i];
         }
         
         for(int i = optl + 1; i <= optr; i++) hint.erase(v[i]);
         divide(l, mid);
         for(int i = mid; i < r; i++) hint.erase(v[i]);
         for(int i = optl + 1; i <= atr; i++) hint.insert(v[i]);
         divide(mid, r);
         for(int i = optl + 1; i <= atr; i++) hint.erase(v[i]);
      }
      else {
         int border = max(mid - 1, optl);
         for(int i = mid; i <= border; i++) hint.insert(v[i]);
         ll best = hint.query() - S(mid, border), atr = border;
         for(int i = border + 1; i <= optr; i++) {
            hint.insert(v[i]);
            if(hint.query() - S(mid, i) >= best) tie(best, atr) = make_pair(hint.query() - S(mid, i), i);
         }
         
         bestcut[mid] = atr, dp[mid] = best;
         
         for(int i = optr; i > border; i--) hint.erase(v[i]);
         divide(l, mid);
         for(int i = mid; i <= border; i++) hint.erase(v[i]);
         for(int i = r; i <= atr; i++) hint.insert(v[i]);
         divide(mid, r);
         for(int i = r; i <= atr; i++) hint.erase(v[i]);
      }
   }
   
}
 
 
vector<int> solve(int n, bool first = 1) {
   for(int i = 1; i <= n; i++) spart[i] += spart[i - 1], dp[i] = -inf, bestcut[i] = 0;
   bestcut[0] = 0;
   bestcut[n - K + 2] = n;
   Divide::divide(0, n - K + 2);
   ll mx = -inf;
   
   vector<int> possible(n + 1);
   
   
   for(int i = 1; i <= n - K + 1; i++) 
      mx = max(mx, dp[i]);
   if(first)
      cout << mx << '\n';
   
   auto cmp = [&](int a, int b) { return (v[a] < v[b] || (v[a] == v[b] && a < b)); };
   set<int, decltype(cmp)> inside(cmp), outside(cmp);
   
   int criteriaIL = n + 1, criteriaIR = -1, criteriaV = inf;
   
   KthHeap forchristsake;
   
   
   for(int i = 1; i <= n; i++) {
      //cerr << i << ' ' << bestcut[i] << ' ' << forchristsake.query() << '\t';
      //for(auto x : forchristsake.inside) cerr << x << ' ';
      //for(auto x : forchristsake.outside) cerr << x << ' ';
      //cerr << '\n';
      
      for(int j = bestcut[i - 1] + 1; j <= bestcut[i]; j++) {
         forchristsake.insert(v[j]);
         inside.insert(j);
         while(sz(inside) > K && [&]() {
           auto it = inside.begin(), it2 = next(it);
            return v[*it] < v[*it2];
         }()) {
            auto t = *inside.begin();
            if(t <= criteriaIR && v[t] >= criteriaV) possible[t] = 1;
            inside.erase(inside.begin());
            outside.insert(t);
         }
         //cerr << '\t' << i << ' ' << j << ' ' << forchristsake.query() << ' ' << S(i, j) << '\n';
         if(forchristsake.query() - S(i, j) == mx) {            
            criteriaIR = bestcut[i];
            criteriaV = v[*inside.begin()];
         }
      }
      if(dp[i] == mx) {
         criteriaIR = bestcut[i];
         criteriaV = v[*inside.begin()];
         //for(auto x : inside) cerr << x << ' ';
         //cerr << '\n';
         //cerr << criteriaIR << ' ' << criteriaV << '\n';
      }
      
      forchristsake.erase(v[i]);
      if(inside.count(i)) {
         if(criteriaIR >= i && v[i] >= criteriaV) possible[i] = 1;
         inside.erase(i); 
      }
      else if(outside.count(i)) outside.erase(i);
      while(sz(inside) < K && sz(outside)) {
         int a = *outside.rbegin();
         outside.erase(a);
         inside.insert(a);
      }
   }
   
   while(!inside.empty()) {
      int t = *inside.begin();
      //cerr << t << ' ' << (t <= criteriaIR && v[t] >= criteriaV) << '\n';
      if(t <= criteriaIR && v[t] >= criteriaV) possible[t] = 1;
      inside.erase(inside.begin());
   }
   for(int i = n; i > 0; i--) spart[i] -= spart[i - 1];
   
   return possible;
}
 
signed main() {
   cin.tie(0) -> sync_with_stdio(0);
   int n;
   cin >> n >> K;
   for(int i = 1; i <= n; i++) {
      cin >> spart[i];
   }
   for(int i = 1; i <= n; i++)
      cin >> v[i];
   auto T = solve(n, 1);
   reverse(spart + 1, spart + n + 1);
   reverse(v + 1, v + n + 1);
   auto T1 = solve(n, 0);
   for(int i = 1; i <= n; i++) cout << (T[i] || T1[n - i + 1]);
   cout << '\n';
    
 
}

Compilation message

trade.cpp: In function 'void Divide::divide(ll, ll)':
trade.cpp:82:19: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   82 |       int mid = l + r >> 1;
      |                 ~~^~~
trade.cpp:93:17: warning: unused variable 'SA' [-Wunused-variable]
   93 |             int SA = S(mid, atr), SB = 0;
      |                 ^~
trade.cpp: In function 'std::vector<long long int> solve(ll, bool)':
trade.cpp:145:8: warning: unused variable 'criteriaIL' [-Wunused-variable]
  145 |    int criteriaIL = n + 1, criteriaIR = -1, criteriaV = inf;
      |        ^~~~~~~~~~

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct

Subtask #1
5.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 2 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Partially correct 1 ms 348 KB Partially correct
7 Partially correct 2 ms 348 KB Partially correct
8 Correct 1 ms 348 KB Output is correct
9 Partially correct 2 ms 348 KB Partially correct
10 Correct 2 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct

Subtask #2
5.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 2 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Partially correct 1 ms 348 KB Partially correct
7 Partially correct 2 ms 348 KB Partially correct
8 Correct 1 ms 348 KB Output is correct
9 Partially correct 2 ms 348 KB Partially correct
10 Correct 2 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Partially correct 1 ms 348 KB Partially correct
18 Partially correct 2 ms 348 KB Partially correct
19 Correct 2 ms 348 KB Output is correct
20 Partially correct 2 ms 348 KB Partially correct
21 Correct 2 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 12 ms 1292 KB Output is correct
24 Partially correct 43 ms 860 KB Partially correct
25 Partially correct 106 ms 856 KB Partially correct
26 Partially correct 83 ms 860 KB Partially correct
27 Correct 64 ms 1184 KB Output is correct
28 Correct 16 ms 860 KB Output is correct
29 Correct 85 ms 1272 KB Output is correct

Subtask #3
0.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Partially correct 763 ms 16256 KB Partially correct
3 Correct 1171 ms 16180 KB Output is correct
4 Correct 3599 ms 24020 KB Output is correct
5 Partially correct 3713 ms 16952 KB Partially correct
6 Partially correct 2240 ms 16324 KB Partially correct
7 Execution timed out 8032 ms 33568 KB Time limit exceeded
8 Halted 0 ms 0 KB -

Subtask #4
0.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Partially correct 763 ms 16256 KB Partially correct
3 Correct 1171 ms 16180 KB Output is correct
4 Correct 3599 ms 24020 KB Output is correct
5 Partially correct 3713 ms 16952 KB Partially correct
6 Partially correct 2240 ms 16324 KB Partially correct
7 Execution timed out 8032 ms 33568 KB Time limit exceeded
8 Halted 0 ms 0 KB -

Subtask #5
0.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 2 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Partially correct 1 ms 348 KB Partially correct
9 Partially correct 2 ms 348 KB Partially correct
10 Correct 1 ms 348 KB Output is correct
11 Partially correct 2 ms 348 KB Partially correct
12 Correct 2 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Partially correct 1 ms 348 KB Partially correct
20 Partially correct 2 ms 348 KB Partially correct
21 Correct 2 ms 348 KB Output is correct
22 Partially correct 2 ms 348 KB Partially correct
23 Correct 2 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 12 ms 1292 KB Output is correct
26 Partially correct 43 ms 860 KB Partially correct
27 Partially correct 106 ms 856 KB Partially correct
28 Partially correct 83 ms 860 KB Partially correct
29 Correct 64 ms 1184 KB Output is correct
30 Correct 16 ms 860 KB Output is correct
31 Correct 85 ms 1272 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Partially correct 763 ms 16256 KB Partially correct
34 Correct 1171 ms 16180 KB Output is correct
35 Correct 3599 ms 24020 KB Output is correct
36 Partially correct 3713 ms 16952 KB Partially correct
37 Partially correct 2240 ms 16324 KB Partially correct
38 Execution timed out 8032 ms 33568 KB Time limit exceeded
39 Halted 0 ms 0 KB -