oj.uz

Submission #342871

# Submission time Handle Problem Language Result Execution time Memory
342871 2021-01-03T05:03:47 Z Rakhmand Chessboard (IZhO18_chessboard) C++14
39 / 100
 120 ms 1900 KB 
//
//  main.cpp
//  torelax
//
//  Created by Rakhman on 11/15/20.
//

#include <cstring>
#include <vector>
#include <list>
#include <map>
#include <set>
#include <deque>
#include <stack>
#include <bitset>
#include <algorithm>
#include <functional>
#include <numeric>
#include <utility>
#include <sstream>
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <queue>
#include <cmath>
#include <cstdlib>
#include <ctime>
#include <cassert>
#include <iterator>

#define ios ios_base::sync_with_stdio(0), cout.tie(0), cin.tie(0);
#define S second
#define F first
#define pb push_back
#define nl '\n'
#define NL cout << '\n';
#define EX exit(0)
#define all(s) s.begin(), s.end()
#define no_answer {cout << "NO"; exit(0);}
#define FOR(i, start, finish, k) for(llong i = start; i <= finish; i += k)

const long long mxn = 2e6 + 110;
const long long mnn = 1e3 + 2;
const long long mod = 1e9 + 7;
const long long inf = 1e18;
const long long OO = 1e9;

typedef long long llong;
typedef unsigned long long ullong;

using namespace std;

int n, k;
llong ans = inf;

struct dot{
    int left, up, right, down;
}b[mxn];

llong get_color(int x, int y, int d){
    return (((x - 1) / d) + ((y - 1) / d)) % 2;
}

llong get(llong d){
    //left-corner is black
    llong blacks = d * d * (n / d) * (n / d / 2);
    if((n / d) % 2 == 1){
        blacks += d * d * (n / d / 2 + 1);
    }
    llong paint = 0;
    llong blacks1 = n * n - blacks;
    for(int i = 1; i <= k; i++){
        int x = b[i].left, y = b[i].up;
        if(get_color(x, y, d) == 0){
            blacks--;
        }else{
            paint++;
        }
    }
    //left-corner is white
    llong paint1 = 0;
    for(int i = 1; i <= k; i++){
        int x = b[i].left, y = b[i].up;
        if(get_color(x, y, d) == 1){
            blacks1--;
        }else{
            paint1++;
        }
    }
    return min(blacks1 + paint1, blacks + paint);
}

int main() {
    ios;
    cin >> n >> k;
    for(int i = 1; i <= k; i++){
        cin >> b[i].left >> b[i].up >> b[i].right >> b[i].down;
    }
    for(int i = 1; i <= sqrt(n); i++){
        if(n % i == 0){
            ans = min(ans, get(i));
            if(n / i != i && i != 1){
                ans = min(get(n / i), ans);
            }
        }
    }
    
    cout << ans;
}


/*
 6 8
 3 3 3 3
 1 2 1 2
 3 4 3 4
 5 5 5 5
 4 3 4 3
 4 4 4 4
 2 1 2 1
 3 6 3 6
 
 */

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 0 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 0 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 512 KB Output is correct

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 25 ms 1260 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
15.0 / 15.0

# 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 384 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct

Subtask #4
16.0 / 16.0

# 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 384 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 12 ms 748 KB Output is correct
17 Correct 29 ms 1644 KB Output is correct
18 Correct 40 ms 1900 KB Output is correct
19 Correct 104 ms 1772 KB Output is correct
20 Correct 120 ms 1900 KB Output is correct
21 Correct 29 ms 1772 KB Output is correct
22 Correct 1 ms 364 KB Output is correct
23 Correct 23 ms 1004 KB Output is correct
24 Correct 36 ms 1772 KB Output is correct
25 Correct 5 ms 492 KB Output is correct
26 Correct 23 ms 1260 KB Output is correct
27 Correct 37 ms 1516 KB Output is correct
28 Correct 39 ms 1772 KB Output is correct
29 Correct 12 ms 876 KB Output is correct
30 Correct 2 ms 364 KB Output is correct

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 25 ms 1260 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 0 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 0 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 512 KB Output is correct
9 Incorrect 25 ms 1260 KB Output isn't correct
10 Halted 0 ms 0 KB -