oj.uz

Submission #342861

# Submission time Handle Problem Language Result Execution time Memory
342861 2021-01-03T04:48:53 Z Rakhmand Chessboard (IZhO18_chessboard) C++14
39 / 100
 335 ms 2924 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;
bool black[mnn][mnn];

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 x){
    llong cnt = 0;
    for(int i = 1; i <= n; i++){
        for(int j = 1; j <= n; j++){
            cnt += (get_color(i, j, x) == black[i][j]);
        }
    }
    llong cnt1 = 0;
    for(int i = 1; i <= n; i++){
        for(int j = 1; j <= n; j++){
            cnt1 += (get_color(i, j, x) != black[i][j]);
        }
    }
    return min(cnt1, cnt);
}

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;
        black[b[i].left][b[i].up] = true;
    }
    for(int i = 1; i <= sqrt(n); i++){
        if(n % i == 0){
            ans = min(ans, get(i));
            //cout << i << ' ' << ans << nl;
            if(n / i != i && i != 1){
                ans = min(get(n / i), ans);
                //cout << n / i << ' ' << ans << nl;
            }
        }
    }
    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 0 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 2 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Runtime error 3 ms 492 KB Execution killed with signal 11 (could be triggered by violating memory limits)
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 492 KB Output is correct
5 Correct 2 ms 492 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 512 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 492 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 2 ms 364 KB Output is correct
14 Correct 1 ms 492 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 492 KB Output is correct
5 Correct 2 ms 492 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 512 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 492 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 2 ms 364 KB Output is correct
14 Correct 1 ms 492 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 45 ms 1644 KB Output is correct
17 Correct 41 ms 2816 KB Output is correct
18 Correct 70 ms 2924 KB Output is correct
19 Correct 328 ms 2796 KB Output is correct
20 Correct 335 ms 2816 KB Output is correct
21 Correct 41 ms 2668 KB Output is correct
22 Correct 182 ms 1132 KB Output is correct
23 Correct 98 ms 1900 KB Output is correct
24 Correct 66 ms 2668 KB Output is correct
25 Correct 83 ms 1388 KB Output is correct
26 Correct 52 ms 2156 KB Output is correct
27 Correct 78 ms 2412 KB Output is correct
28 Correct 67 ms 2832 KB Output is correct
29 Correct 25 ms 1900 KB Output is correct
30 Correct 38 ms 1388 KB Output is correct

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Runtime error 3 ms 492 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 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 2 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 Runtime error 3 ms 492 KB Execution killed with signal 11 (could be triggered by violating memory limits)
10 Halted 0 ms 0 KB -