oj.uz

Submission #917167

# Submission time Handle Problem Language Result Execution time Memory
917167 2024-01-27T11:01:54 Z dilanyan Chessboard (IZhO18_chessboard) C++17
39 / 100
 32 ms 10840 KB 
//-------------dilanyan------------\\ 
 
#define _CRT_SECURE_NO_WARNINGS
#include<bits/stdc++.h>
#include<stdio.h>
using namespace std;
 
//------------------KarginDefines--------------------\\ 
 
#define ll long long
#define pb push_back
#define all(u) (u).begin(), (u).end()
#define pqueue priority_queue
#define upper upper_bound
#define lower lower_bound
#define umap unordered_map
#define uset unordered_set
#define Kargin ios_base::sync_with_stdio(false);cin.tie(NULL);
#define Usaco freopen(".in", "r", stdin); freopen(".out", "w", stdout);
 
 
//-------------------KarginConstants------------------\\ 
 
const ll mod = 1000000007;
const ll inf = 1e9 + 15;
 
//-------------------KarginCode------------------------\\ 
 
const int N = 1005;
bool a[N][N]; // false -> white true -> black
int pref[2][N][N]; // 0 spitakneri qanaky minchev i,j u 1 severi qanaky

bool isprime(int n) {
    if (n <= 1) return false;
    for (int i = 2; i * i <= n; i++) {
        if (n % i == 0) return false;
    }
    return true;
}

void KarginSolve() {
    int n, k;
    cin >> n >> k;
    int sq = sqrt(n);
    vector<int> div;
    for (int i = 1;i <= sq;i++) {
        if (n % i == 0) {
            div.pb(i);
            if (i * i != n) div.pb(n / i);
        }
    }
    if (n <= 1000) {
        for (int i = 0; i < k;i++) {
            int x1, y1, x2, y2;
            cin >> x1 >> y1 >> x2 >> y2;
            a[x1][y1] = true;
        }
        for (int i = 1;i <= n;i++) {
            for (int j = 1;j <= n;j++) {
                for (int c = 0;c < 2;c++) {
                    pref[c][i][j] = pref[c][i - 1][j] + pref[c][i][j - 1] - pref[c][i - 1][j - 1] + (a[i][j] == c);
                }
            }
        }
        int ans = n * n / 2;
        for (int d : div) {
            if (d == n) continue;
            int fw = 0, fb = 0;
            for (int i = d, it = 1;i <= n;i += d, it++) {
                for (int j = d, jt = 1;j <= n;j += d, jt++) {
                    if (it & 1) {
                        if (jt & 1) {
                            fb += pref[0][i][j] - pref[0][i - d][j] - pref[0][i][j - d] + pref[0][i - d][j - d];
                            fw += pref[1][i][j] - pref[1][i - d][j] - pref[1][i][j - d] + pref[1][i - d][j - d];
                        }
                        else {
                            fb += pref[1][i][j] - pref[1][i - d][j] - pref[1][i][j - d] + pref[1][i - d][j - d];
                            fw += pref[0][i][j] - pref[0][i - d][j] - pref[0][i][j - d] + pref[0][i - d][j - d];
                        }
                    }
                    else {
                        if (jt & 1) {
                            fb += pref[1][i][j] - pref[1][i - d][j] - pref[1][i][j - d] + pref[1][i - d][j - d];
                            fw += pref[0][i][j] - pref[0][i - d][j] - pref[0][i][j - d] + pref[0][i - d][j - d];
                        }
                        else {
                            fb += pref[0][i][j] - pref[0][i - d][j] - pref[0][i][j - d] + pref[0][i - d][j - d];
                            fw += pref[1][i][j] - pref[1][i - d][j] - pref[1][i][j - d] + pref[1][i - d][j - d];
                        }
                    }
                }
            }
            ans = min(ans, min(fw, fb));
        }
        cout << ans << '\n';
    }
}
 
int main() {
    //Usaco
    Kargin;
    int test = 1;
    //cin >> test;
    while (test--) {
        KarginSolve();
    }
    return 0;
}

Compilation message

chessboard.cpp:1:1: warning: multi-line comment [-Wcomment]
    1 | //-------------dilanyan------------\\
      | ^
chessboard.cpp:8:1: warning: multi-line comment [-Wcomment]
    8 | //------------------KarginDefines--------------------\\
      | ^
chessboard.cpp:22:1: warning: multi-line comment [-Wcomment]
   22 | //-------------------KarginConstants------------------\\
      | ^
chessboard.cpp:27:1: warning: multi-line comment [-Wcomment]
   27 | //-------------------KarginCode------------------------\\
      | ^

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 1116 KB Output is correct
3 Correct 1 ms 1116 KB Output is correct
4 Correct 1 ms 1368 KB Output is correct
5 Correct 1 ms 1116 KB Output is correct
6 Correct 1 ms 1112 KB Output is correct
7 Correct 1 ms 1116 KB Output is correct
8 Correct 1 ms 1112 KB Output is correct

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 348 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 2908 KB Output is correct
2 Correct 1 ms 2908 KB Output is correct
3 Correct 1 ms 2908 KB Output is correct
4 Correct 1 ms 2904 KB Output is correct
5 Correct 1 ms 2904 KB Output is correct
6 Correct 1 ms 2908 KB Output is correct
7 Correct 1 ms 3164 KB Output is correct
8 Correct 1 ms 2908 KB Output is correct
9 Correct 1 ms 3164 KB Output is correct
10 Correct 1 ms 2908 KB Output is correct
11 Correct 1 ms 2904 KB Output is correct
12 Correct 1 ms 2908 KB Output is correct
13 Correct 1 ms 2908 KB Output is correct
14 Correct 1 ms 2908 KB Output is correct
15 Correct 1 ms 2772 KB Output is correct

Subtask #4
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2908 KB Output is correct
2 Correct 1 ms 2908 KB Output is correct
3 Correct 1 ms 2908 KB Output is correct
4 Correct 1 ms 2904 KB Output is correct
5 Correct 1 ms 2904 KB Output is correct
6 Correct 1 ms 2908 KB Output is correct
7 Correct 1 ms 3164 KB Output is correct
8 Correct 1 ms 2908 KB Output is correct
9 Correct 1 ms 3164 KB Output is correct
10 Correct 1 ms 2908 KB Output is correct
11 Correct 1 ms 2904 KB Output is correct
12 Correct 1 ms 2908 KB Output is correct
13 Correct 1 ms 2908 KB Output is correct
14 Correct 1 ms 2908 KB Output is correct
15 Correct 1 ms 2772 KB Output is correct
16 Correct 13 ms 9308 KB Output is correct
17 Correct 26 ms 10420 KB Output is correct
18 Correct 28 ms 10840 KB Output is correct
19 Correct 25 ms 10332 KB Output is correct
20 Correct 30 ms 10640 KB Output is correct
21 Correct 23 ms 10588 KB Output is correct
22 Correct 8 ms 9052 KB Output is correct
23 Correct 18 ms 9812 KB Output is correct
24 Correct 25 ms 10580 KB Output is correct
25 Correct 9 ms 9504 KB Output is correct
26 Correct 17 ms 9820 KB Output is correct
27 Correct 25 ms 10244 KB Output is correct
28 Correct 32 ms 10636 KB Output is correct
29 Correct 13 ms 9564 KB Output is correct
30 Correct 9 ms 9048 KB Output is correct

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 1116 KB Output is correct
3 Correct 1 ms 1116 KB Output is correct
4 Correct 1 ms 1368 KB Output is correct
5 Correct 1 ms 1116 KB Output is correct
6 Correct 1 ms 1112 KB Output is correct
7 Correct 1 ms 1116 KB Output is correct
8 Correct 1 ms 1112 KB Output is correct
9 Incorrect 0 ms 348 KB Output isn't correct
10 Halted 0 ms 0 KB -