oj.uz

Submission #986337

# Submission time Handle Problem Language Result Execution time Memory
986337 2024-05-20T10:44:14 Z vjudge1 Mixture (BOI20_mixture) C++17
100 / 100
 345 ms 25412 KB 
#include <bits/stdc++.h>
#define all(x) (x).begin(),(x).end()
using namespace std;

//#ifndef DLOCAL
//   #define cin fin
//   #define cout fout
//   ifstream cin(".in");
//   ofstream cout(".out");
//#endif

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>;

using point = pair<double,double>;
#define x first
#define y second

#define ERROR (-100)

const double PI = acos(-1);
const double eps = 1e-10;

double difference_(double start, double finish) {
   start -= eps;
   finish += eps;
   
   if(start < finish) return finish - start;
   return finish - start + 2 * PI;
}
static inline double reeps(double X) {
   return X;
}
double angle(double A, double B) {
   auto U = atan2(A, B);
   if(U < 0) return reeps(2. * PI + U);
   return reeps(U);
}

double flip(double angle) {
   if(angle == ERROR) return ERROR;
   return angle < PI? angle + PI : angle - PI;
}


template<typename T>
struct MP {
   map<double, T> freq;
   T& operator[](double a) {
      auto it = freq.lower_bound(a - eps);
      if(it != freq.end() && it -> first <= a + eps) return freq[it -> first];
      return freq[a];
   }
};

struct AdjacentDifferences {
   multiset<double> angles;
   multiset<double>::iterator before(multiset<double>::iterator it) {
      if(it == angles.begin()) return prev(angles.end());
      return prev(it);
   }
   multiset<double>::iterator after(multiset<double>::iterator it) {
      if(next(it) == angles.end()) return angles.begin();
      return next(it);
   }
   
   double difference(multiset<double>::iterator L, multiset<double>::iterator R) {
      //cerr << difference_(*L, *R) << '\n';
      if(R == angles.begin() && abs(*L - *R) <= eps) return 2 * PI;
      return difference_(*L, *R);
   }
   
   multiset<double> differences;
   
   pair<double, double> jump = pair<double, double>{ERROR, ERROR};
   
   void insert(double U) {      
      auto it = angles.insert(U), L = before(it), R = after(it);
      if(angles.size() >= 3) {
         if(difference(L, R) > PI) jump = make_pair(ERROR, ERROR);
      }
      if(angles.size() >= 2) {
         if(difference(L, it) > PI) jump = make_pair(*L, *it);
         if(difference(it, R) > PI) jump = make_pair(*it, *R);
      }
   }
   
   void erase(double U) {
      auto it = angles.find(U), L = before(it), R = after(it);
      if(angles.size() >= 2) {
         if(difference(L, it) > PI) jump = make_pair(ERROR, ERROR);
         if(difference(it, R) > PI) jump = make_pair(ERROR, ERROR);
      }
      angles.erase(it);
      if(angles.size() >= 2) {
         if(difference(L, R) > PI) jump = make_pair(*L, *R);
      }
      
   }
   
   bool count(double L, double R) {
      if(L == ERROR || R == ERROR) return 0;
      if(L > R) return count(L, 2 * PI) || count(0, R);
      auto it = angles.lower_bound(L - eps);
      if(it != angles.end() && *it <= R + eps) return 1;
      return 0;
   }
};

namespace DS {
   int cnt_0;
   
   MP<pii> freq;
   MP<int> point_freq, vector_freq;
   
   AdjacentDifferences point_adjdif, vector_adjdif;
   
   int paired_with_vector = 0;
   int ok_pairs = 0;
   
   void insert(point a) {
      if(a.x == 0 && a.y == 0) cnt_0++;
      else {
         double U = angle(a.y, a.x);
         //cerr << "\t + point " << U << '\n';
         point_adjdif.insert(U);
         
         double link = (U < PI? U : U - PI);
         bool ready = 0;
         
         if(freq[link].first * freq[link].second == 0) ready = 1;
         if(U < PI) freq[U].first++;
         else freq[U - PI].second++;
         if(freq[link].first * freq[link].second != 0 && ready) ok_pairs++;
         
         paired_with_vector += vector_freq[flip(U)];
         point_freq[U]++;
      }
   }
   
   void erase(point a) {
      if(a.x == 0 && a.y == 0) cnt_0--;
      else {
         double U = angle(a.y, a.x);
         point_adjdif.erase(U);
         
         double link = (U < PI? U : U - PI);
         bool ready = 0;
         
         if(freq[link].first * freq[link].second != 0) ready = 1;
         if(U < PI) freq[U].first--;
         else  freq[U - PI].second--;
         if(freq[link].first * freq[link].second == 0 && ready) ok_pairs--;
         
         paired_with_vector -= vector_freq[flip(U)];
         point_freq[U]--;
      }
   }
   
   void insert_vector(point a) {
      double U = angle(a.y, a.x);
      //cerr << "\t + vector " << U << '\n';
      vector_adjdif.insert(U);
      paired_with_vector += point_freq[flip(U)];
      vector_freq[U]++;
      return;
   }
   
   void erase_vector(point a) {
      double U = angle(a.y, a.x);
      vector_adjdif.erase(U);
      paired_with_vector -= point_freq[flip(U)];
      vector_freq[U]--;
      return;
   }
      
   
   int query() {
      //cerr << '\t' << angles.size() << '\n';
      
      
      if(cnt_0) return 1;
      if(ok_pairs) return 2;
      if(paired_with_vector) return 2;
      auto [l, r] = point_adjdif.jump;
      //cerr << l << ' ' << r << '\t';
      //for(auto x : point_adjdif.angles) cerr << x << ' ';
      //cerr << '\n';
      
      if(point_adjdif.jump.first == ERROR && sz(point_adjdif.angles) >= 3) return 3;
      if(vector_adjdif.jump.second == ERROR  && sz(vector_adjdif.angles) >= 3) return 3;
      
      //auto [l, r] = point_adjdif.jump;
      //cerr << l << ' ' << r << '\n';
      l = flip(l);
      r = flip(r);
      swap(l, r);
      if(vector_adjdif.count(l, r)) return 3;
      //cerr << l << ' ' << r << '\n';
      
      tie(l, r) = vector_adjdif.jump;
      l = flip(l);
      r = flip(r);
      swap(l, r);
      if(point_adjdif.count(l, r)) return 3;
      return 0;
   }
   
   
   
}

signed main() {
   cin.tie(0) -> sync_with_stdio(0);
   double a, b, c;
   
   int este_zero = 0;
   
   cin >> a >> b >> c;
   point center;
   
   double T[3] = {a, b, c};
   
   vector<int> idx(3);
   iota(all(idx), 0);
   #ifndef DLOCAL
      sort(all(idx), [&](int a, int b) { return T[a] > T[b]; });
   #endif
   a = T[idx[0]];
   b = T[idx[1]];
   c = T[idx[2]];
   
   //cerr << a << ' ' << b << ' ' << c << '\n';
   
   center.x = b / a;
   center.y = c / a;
   
   int n;
   cin >> n;
   vector<tuple<double, double, double>> v;
   
   //if(este_zero == 0) {
      vector<int> pula;
      for(int i = 0; i < n; i++) {
         char ch;
         cin >> ch;
         point here;
         bool ebine = 1;
         
         if(ch == 'R') {
            int t;
            cin >> t;
            t--;
            tie(a, b, c) = v[t];
         }
         else {
            cin >> a >> b >> c;
            T[0] = a, T[1] = b, T[2] = c;
            a = T[idx[0]];
            b = T[idx[1]];
            c = T[idx[2]];
            
            v.emplace_back(a, b, c);
         }
            
         if(a == 0) here.x = b, here.y = c;
         else {
            here.x = b / a - center.x;
            here.y = c / a - center.y;
         }
         
         
         if(ch == 'R') {
            if(a != 0)
               DS::erase(here);
            else
               DS::erase_vector(here);
         }
         else {
            if(a != 0)
               DS::insert(here);
            else
               DS::insert_vector(here);
         }
         
         cout << DS::query() << '\n';
      }
   
}

/**
      Istenem! Nu poate fi real.
-- Surse verificate
*/

Compilation message

Mixture.cpp: In function 'int main()':
Mixture.cpp:254:15: warning: unused variable 'ebine' [-Wunused-variable]
  254 |          bool ebine = 1;
      |               ^~~~~
Mixture.cpp:223:8: warning: unused variable 'este_zero' [-Wunused-variable]
  223 |    int este_zero = 0;
      |        ^~~~~~~~~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 504 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 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 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 504 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 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 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 2 ms 344 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 2 ms 344 KB Output is correct
31 Correct 1 ms 348 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Correct 1 ms 348 KB Output is correct
34 Correct 2 ms 348 KB Output is correct
35 Correct 1 ms 348 KB Output is correct
36 Correct 2 ms 600 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 504 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 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 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 2 ms 344 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 2 ms 344 KB Output is correct
31 Correct 1 ms 348 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Correct 1 ms 348 KB Output is correct
34 Correct 2 ms 348 KB Output is correct
35 Correct 1 ms 348 KB Output is correct
36 Correct 2 ms 600 KB Output is correct
37 Correct 2 ms 348 KB Output is correct
38 Correct 2 ms 468 KB Output is correct
39 Correct 2 ms 604 KB Output is correct
40 Correct 2 ms 604 KB Output is correct
41 Correct 2 ms 856 KB Output is correct
42 Correct 2 ms 604 KB Output is correct
43 Correct 2 ms 604 KB Output is correct
44 Correct 2 ms 604 KB Output is correct
45 Correct 3 ms 604 KB Output is correct
46 Correct 7 ms 860 KB Output is correct
47 Correct 8 ms 860 KB Output is correct
48 Correct 3 ms 604 KB Output is correct
49 Correct 3 ms 600 KB Output is correct
50 Correct 3 ms 348 KB Output is correct
51 Correct 9 ms 1116 KB Output is correct
52 Correct 7 ms 724 KB Output is correct
53 Correct 10 ms 1116 KB Output is correct
54 Correct 10 ms 1116 KB Output is correct
55 Correct 3 ms 604 KB Output is correct
56 Correct 4 ms 756 KB Output is correct

Subtask #4
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 504 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 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 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 2 ms 344 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 2 ms 344 KB Output is correct
31 Correct 1 ms 348 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Correct 1 ms 348 KB Output is correct
34 Correct 2 ms 348 KB Output is correct
35 Correct 1 ms 348 KB Output is correct
36 Correct 2 ms 600 KB Output is correct
37 Correct 2 ms 348 KB Output is correct
38 Correct 2 ms 468 KB Output is correct
39 Correct 2 ms 604 KB Output is correct
40 Correct 2 ms 604 KB Output is correct
41 Correct 2 ms 856 KB Output is correct
42 Correct 2 ms 604 KB Output is correct
43 Correct 2 ms 604 KB Output is correct
44 Correct 2 ms 604 KB Output is correct
45 Correct 3 ms 604 KB Output is correct
46 Correct 7 ms 860 KB Output is correct
47 Correct 8 ms 860 KB Output is correct
48 Correct 3 ms 604 KB Output is correct
49 Correct 3 ms 600 KB Output is correct
50 Correct 3 ms 348 KB Output is correct
51 Correct 9 ms 1116 KB Output is correct
52 Correct 7 ms 724 KB Output is correct
53 Correct 10 ms 1116 KB Output is correct
54 Correct 10 ms 1116 KB Output is correct
55 Correct 3 ms 604 KB Output is correct
56 Correct 4 ms 756 KB Output is correct
57 Correct 5 ms 776 KB Output is correct
58 Correct 15 ms 1528 KB Output is correct
59 Correct 14 ms 1372 KB Output is correct
60 Correct 12 ms 1220 KB Output is correct
61 Correct 18 ms 2188 KB Output is correct
62 Correct 19 ms 2200 KB Output is correct
63 Correct 317 ms 17628 KB Output is correct
64 Correct 276 ms 17656 KB Output is correct
65 Correct 264 ms 14316 KB Output is correct
66 Correct 260 ms 14096 KB Output is correct
67 Correct 0 ms 344 KB Output is correct
68 Correct 0 ms 348 KB Output is correct
69 Correct 345 ms 25412 KB Output is correct
70 Correct 295 ms 20252 KB Output is correct
71 Correct 293 ms 19896 KB Output is correct
72 Correct 269 ms 17076 KB Output is correct
73 Correct 292 ms 18172 KB Output is correct