oj.uz

Submission #570526

# Submission time Handle Problem Language Result Execution time Memory
570526 2022-05-30T11:28:14 Z Sam_a17 Chessboard (IZhO18_chessboard) C++14
70 / 100
 1767 ms 4596 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 blt __builtin_popcount

#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, class V> void print(T v[],V n) {cerr << "["; for(int i = 0; i < n; i++) {print(v[i]); cerr << " "; } 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(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 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>;
vector<pair<pair< long long,  long long>, pair< long long,  long long>>> points;
long long ansi = 1e17;

vector<long long> get_divisors(long long n) {
  vector<long long> answ{1};
  for(long long i = 2; i * i <= n; i++) {
    if(n % i == 0) {
      answ.push_back(i);
      if(n / i != i) {
        answ.push_back(n / i);
      }
    }
  }
  return answ;
}

long long n, k;

void check(long long curr) {
  long long first = 0, second = 0;
  for(auto i: points) {
    long long x1 = i.first.first - 1, y1 = i.first.second - 1;
    long long x2 = i.second.first - 1, y2 = i.second.second - 1;

    // y1 -> y2

    long long block1 = y1 / curr, block2 = y2 / curr;

    if(block1 == block2) {
      long long toadd = y2 - y1 + 1;

      long long block11 = x1 / curr, block22 = x2 / curr;

      if(block11 == block22) {
        long long bazm = x2 - x1 + 1;
        if(block11 % 2 == block1 % 2) {
          first += bazm * toadd;
        } else {
          second += bazm * toadd;
        }
      }
      else {

        long long start = x1;
        while(start / curr == block11) {
          if(block11 % 2 == block1 % 2) {
            first += toadd;
          } else {
            second += toadd;
          }
          start++;
        }

        start = x2;

        while(start / curr == block22) {
          if(block22 % 2 == block1 % 2) {
            first += toadd;
          } else {
            second += toadd;
          }
          start--;
        }

        for(long long j = block11 + 1; j < block22; j++) {
          if(j % 2 == block1 % 2) {
            first += toadd * curr;
          } else {
            second += toadd * curr;
          }
        }
      }

    }
    else {
      long long block11 = x1 / curr, block22 = x2 / curr;

      if(block11 == block22) {
        long long toadd = x2 - x1 + 1;
        long long start = y1;

        while(start / curr == block1) {
          if(block11 % 2 == block1 % 2) {
            first += toadd;
          } else {
            second += toadd;
          }
          start++;
        }

        start = y2;
        while(start / curr == block2) {
          if(block11 % 2 == block2 % 2) {
            first += toadd;
          } else {
            second += toadd;
          }
          start--;
        }

        for(long long j = block1 + 1; j < block2; j++) {
          if(j % 2 == block11 % 2) {
            first += toadd * curr;
          } else {
            second += toadd * curr;
          }
        }
      }
      else {
        long long start = y1;
        long long needFirst = 0, needSecond = 0;
        while(start / curr == block1) {
          if(block11 % 2 == block1 % 2) {
            needFirst++;
          } else {
            needSecond++;
          }
          start++;
        }

        long long bazm = (curr - x1 % curr + 1);
        long long bazm2 = (x2 % curr + 1);
        first += needFirst * bazm;
        second += needSecond * bazm;
        first += needFirst * bazm2;
        second += needSecond * bazm2;

        start = y2;
        while(start / curr == block2) {
          if(block11 % 2 == block2 % 2) {
            needFirst++;
          } else {
            needSecond++;
          }
          start--;
        }
        first += needFirst * bazm;
        second += needSecond * bazm;
        first += needFirst * bazm2;
        second += needSecond * bazm2;


        for(long long j = block1 + 1; j < block2; j++) {
          if(j % 2 == block11 % 2) {
            first += curr * bazm;
            first += curr * bazm2;
            needFirst += curr;
          } else {
            second += curr * bazm;
            second += curr * bazm2;
            needSecond += curr;
          }
        }


        //
        for(long long j = block11 + 1; j < block22; j++) {
          if(block11 % 2 == j % 2) {
            first += needFirst * curr;
            second += needSecond * curr;
          } else {
            second += needFirst * curr;
            first += needSecond * curr;
          }
        }
      }
    }
  }

  long long row = (n * n) / (curr * curr);
  long long fs = row / 2, ss = row / 2;
  if(row & 1) {
    fs++;
  }

  fs = fs * (curr * curr);
  ss = ss * (curr * curr);

  ansi = min(ansi, fs - first + second);
  ansi = min(ansi, ss - second + first);
}

void solve_() {
  cin >> n >> k;
  vector<long long> div = get_divisors(n);

  for(int i = 1; i <= k; i++) {
    int x1, y1, x2, y2;
    cin >> x1 >> y1 >> x2 >> y2;
    points.push_back({{x1, y1}, {x2, y2}});
  }

  sort(all(points));

  for(auto i: div) {
    check(i);
  }

  printf("%lld\n", ansi);
}

int main() {
  setIO();

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

  int test_cases = 1;
  solve(test_cases);

  return 0;
}

Compilation message

chessboard.cpp: In function 'void setIO(std::string)':
chessboard.cpp:63:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   63 |     freopen((str + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
chessboard.cpp:64:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   64 |     freopen((str + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
8.0 / 8.0

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

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 31 ms 2512 KB Output is correct
2 Correct 8 ms 1492 KB Output is correct
3 Correct 19 ms 2432 KB Output is correct
4 Correct 20 ms 2512 KB Output is correct
5 Correct 28 ms 2464 KB Output is correct
6 Correct 15 ms 2512 KB Output is correct
7 Correct 4 ms 600 KB Output is correct
8 Correct 17 ms 2468 KB Output is correct
9 Correct 41 ms 4556 KB Output is correct
10 Correct 25 ms 2512 KB Output is correct

Subtask #3
15.0 / 15.0

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

Subtask #4
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 2 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 14 ms 1492 KB Output is correct
17 Correct 36 ms 4500 KB Output is correct
18 Correct 58 ms 4524 KB Output is correct
19 Correct 104 ms 4496 KB Output is correct
20 Correct 107 ms 4540 KB Output is correct
21 Correct 33 ms 4556 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 29 ms 2492 KB Output is correct
24 Correct 45 ms 4488 KB Output is correct
25 Correct 5 ms 856 KB Output is correct
26 Correct 25 ms 2512 KB Output is correct
27 Correct 33 ms 4556 KB Output is correct
28 Correct 45 ms 4556 KB Output is correct
29 Correct 14 ms 2512 KB Output is correct
30 Correct 2 ms 468 KB Output is correct

Subtask #5
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 31 ms 2512 KB Output is correct
2 Correct 8 ms 1492 KB Output is correct
3 Correct 19 ms 2432 KB Output is correct
4 Correct 20 ms 2512 KB Output is correct
5 Correct 28 ms 2464 KB Output is correct
6 Correct 15 ms 2512 KB Output is correct
7 Correct 4 ms 600 KB Output is correct
8 Correct 17 ms 2468 KB Output is correct
9 Correct 41 ms 4556 KB Output is correct
10 Correct 25 ms 2512 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 2 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 14 ms 1492 KB Output is correct
27 Correct 36 ms 4500 KB Output is correct
28 Correct 58 ms 4524 KB Output is correct
29 Correct 104 ms 4496 KB Output is correct
30 Correct 107 ms 4540 KB Output is correct
31 Correct 33 ms 4556 KB Output is correct
32 Correct 1 ms 340 KB Output is correct
33 Correct 29 ms 2492 KB Output is correct
34 Correct 45 ms 4488 KB Output is correct
35 Correct 5 ms 856 KB Output is correct
36 Correct 25 ms 2512 KB Output is correct
37 Correct 33 ms 4556 KB Output is correct
38 Correct 45 ms 4556 KB Output is correct
39 Correct 14 ms 2512 KB Output is correct
40 Correct 2 ms 468 KB Output is correct
41 Correct 90 ms 4556 KB Output is correct
42 Correct 46 ms 4512 KB Output is correct
43 Correct 59 ms 4556 KB Output is correct
44 Correct 44 ms 4596 KB Output is correct
45 Correct 50 ms 4560 KB Output is correct
46 Correct 116 ms 4556 KB Output is correct
47 Correct 39 ms 4580 KB Output is correct
48 Correct 51 ms 4540 KB Output is correct
49 Correct 40 ms 4556 KB Output is correct
50 Correct 380 ms 4512 KB Output is correct
51 Correct 389 ms 4548 KB Output is correct
52 Correct 372 ms 4536 KB Output is correct
53 Correct 405 ms 4556 KB Output is correct
54 Correct 367 ms 4556 KB Output is correct
55 Correct 433 ms 4548 KB Output is correct
56 Correct 361 ms 4464 KB Output is correct

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 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 31 ms 2512 KB Output is correct
10 Correct 8 ms 1492 KB Output is correct
11 Correct 19 ms 2432 KB Output is correct
12 Correct 20 ms 2512 KB Output is correct
13 Correct 28 ms 2464 KB Output is correct
14 Correct 15 ms 2512 KB Output is correct
15 Correct 4 ms 600 KB Output is correct
16 Correct 17 ms 2468 KB Output is correct
17 Correct 41 ms 4556 KB Output is correct
18 Correct 25 ms 2512 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 212 KB Output is correct
29 Correct 1 ms 340 KB Output is correct
30 Correct 1 ms 340 KB Output is correct
31 Correct 2 ms 340 KB Output is correct
32 Correct 1 ms 340 KB Output is correct
33 Correct 1 ms 340 KB Output is correct
34 Correct 14 ms 1492 KB Output is correct
35 Correct 36 ms 4500 KB Output is correct
36 Correct 58 ms 4524 KB Output is correct
37 Correct 104 ms 4496 KB Output is correct
38 Correct 107 ms 4540 KB Output is correct
39 Correct 33 ms 4556 KB Output is correct
40 Correct 1 ms 340 KB Output is correct
41 Correct 29 ms 2492 KB Output is correct
42 Correct 45 ms 4488 KB Output is correct
43 Correct 5 ms 856 KB Output is correct
44 Correct 25 ms 2512 KB Output is correct
45 Correct 33 ms 4556 KB Output is correct
46 Correct 45 ms 4556 KB Output is correct
47 Correct 14 ms 2512 KB Output is correct
48 Correct 2 ms 468 KB Output is correct
49 Correct 90 ms 4556 KB Output is correct
50 Correct 46 ms 4512 KB Output is correct
51 Correct 59 ms 4556 KB Output is correct
52 Correct 44 ms 4596 KB Output is correct
53 Correct 50 ms 4560 KB Output is correct
54 Correct 116 ms 4556 KB Output is correct
55 Correct 39 ms 4580 KB Output is correct
56 Correct 51 ms 4540 KB Output is correct
57 Correct 40 ms 4556 KB Output is correct
58 Correct 380 ms 4512 KB Output is correct
59 Correct 389 ms 4548 KB Output is correct
60 Correct 372 ms 4536 KB Output is correct
61 Correct 405 ms 4556 KB Output is correct
62 Correct 367 ms 4556 KB Output is correct
63 Correct 433 ms 4548 KB Output is correct
64 Correct 361 ms 4464 KB Output is correct
65 Correct 0 ms 212 KB Output is correct
66 Correct 1 ms 212 KB Output is correct
67 Incorrect 1767 ms 4556 KB Output isn't correct
68 Halted 0 ms 0 KB -