oj.uz

Submission #917281

# Submission time Handle Problem Language Result Execution time Memory
917281 2024-01-27T15:43:19 Z Sam_a17 Chessboard (IZhO18_chessboard) C++17
47 / 100
 42 ms 9308 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() {
    long long n, k;
    cin >> n >> k;
    long long sq = sqrt(n);
    vector<int> div{1};
    for (int i = 2;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';
    }
    else if (div.size() == 1) {
        ll fw = n * n / 2, fb = (n * n + 1) / 2;
        for (int i = 0;i < k;i++) {
            int x, y, x1, y1;
            cin >> x >> y >> x1 >> y1;
            if (x & 1) {
                if (y & 1) fb--, fw++;
                else fw--, fb++;
            }
            else {
                if (y & 1) fw--, fb++;
                else fb--, fw++;
            }
        }
        cout << min(fw, fb) << '\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 1116 KB Output is correct
5 Correct 1 ms 1112 KB Output is correct
6 Correct 1 ms 1116 KB Output is correct
7 Correct 1 ms 1116 KB Output is correct
8 Correct 1 ms 1116 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 612 KB Output is correct
2 Correct 5 ms 604 KB Output is correct
3 Correct 11 ms 1220 KB Output is correct
4 Correct 10 ms 1248 KB Output is correct
5 Correct 13 ms 1624 KB Output is correct
6 Correct 9 ms 1116 KB Output is correct
7 Correct 3 ms 632 KB Output is correct
8 Correct 10 ms 1104 KB Output is correct
9 Correct 24 ms 2388 KB Output is correct
10 Correct 13 ms 1624 KB Output is correct

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 2 ms 2908 KB Output is correct
4 Correct 1 ms 2904 KB Output is correct
5 Correct 1 ms 2908 KB Output is correct
6 Correct 1 ms 2904 KB Output is correct
7 Correct 2 ms 3160 KB Output is correct
8 Correct 1 ms 2908 KB Output is correct
9 Correct 2 ms 3164 KB Output is correct
10 Correct 2 ms 2908 KB Output is correct
11 Correct 1 ms 2908 KB Output is correct
12 Correct 1 ms 2908 KB Output is correct
13 Correct 2 ms 2904 KB Output is correct
14 Correct 1 ms 2908 KB Output is correct
15 Correct 1 ms 2908 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 2 ms 2908 KB Output is correct
4 Correct 1 ms 2904 KB Output is correct
5 Correct 1 ms 2908 KB Output is correct
6 Correct 1 ms 2904 KB Output is correct
7 Correct 2 ms 3160 KB Output is correct
8 Correct 1 ms 2908 KB Output is correct
9 Correct 2 ms 3164 KB Output is correct
10 Correct 2 ms 2908 KB Output is correct
11 Correct 1 ms 2908 KB Output is correct
12 Correct 1 ms 2908 KB Output is correct
13 Correct 2 ms 2904 KB Output is correct
14 Correct 1 ms 2908 KB Output is correct
15 Correct 1 ms 2908 KB Output is correct
16 Correct 14 ms 9052 KB Output is correct
17 Correct 27 ms 9308 KB Output is correct
18 Correct 29 ms 9040 KB Output is correct
19 Correct 42 ms 9096 KB Output is correct
20 Correct 31 ms 9116 KB Output is correct
21 Correct 26 ms 9308 KB Output is correct
22 Correct 8 ms 9048 KB Output is correct
23 Correct 19 ms 9168 KB Output is correct
24 Correct 24 ms 9160 KB Output is correct
25 Correct 9 ms 9052 KB Output is correct
26 Correct 19 ms 9120 KB Output is correct
27 Correct 23 ms 9128 KB Output is correct
28 Correct 25 ms 9040 KB Output is correct
29 Correct 13 ms 9052 KB Output is correct
30 Correct 10 ms 9052 KB Output is correct

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 612 KB Output is correct
2 Correct 5 ms 604 KB Output is correct
3 Correct 11 ms 1220 KB Output is correct
4 Correct 10 ms 1248 KB Output is correct
5 Correct 13 ms 1624 KB Output is correct
6 Correct 9 ms 1116 KB Output is correct
7 Correct 3 ms 632 KB Output is correct
8 Correct 10 ms 1104 KB Output is correct
9 Correct 24 ms 2388 KB Output is correct
10 Correct 13 ms 1624 KB Output is correct
11 Correct 1 ms 2908 KB Output is correct
12 Correct 1 ms 2908 KB Output is correct
13 Correct 2 ms 2908 KB Output is correct
14 Correct 1 ms 2904 KB Output is correct
15 Correct 1 ms 2908 KB Output is correct
16 Correct 1 ms 2904 KB Output is correct
17 Correct 2 ms 3160 KB Output is correct
18 Correct 1 ms 2908 KB Output is correct
19 Correct 2 ms 3164 KB Output is correct
20 Correct 2 ms 2908 KB Output is correct
21 Correct 1 ms 2908 KB Output is correct
22 Correct 1 ms 2908 KB Output is correct
23 Correct 2 ms 2904 KB Output is correct
24 Correct 1 ms 2908 KB Output is correct
25 Correct 1 ms 2908 KB Output is correct
26 Correct 14 ms 9052 KB Output is correct
27 Correct 27 ms 9308 KB Output is correct
28 Correct 29 ms 9040 KB Output is correct
29 Correct 42 ms 9096 KB Output is correct
30 Correct 31 ms 9116 KB Output is correct
31 Correct 26 ms 9308 KB Output is correct
32 Correct 8 ms 9048 KB Output is correct
33 Correct 19 ms 9168 KB Output is correct
34 Correct 24 ms 9160 KB Output is correct
35 Correct 9 ms 9052 KB Output is correct
36 Correct 19 ms 9120 KB Output is correct
37 Correct 23 ms 9128 KB Output is correct
38 Correct 25 ms 9040 KB Output is correct
39 Correct 13 ms 9052 KB Output is correct
40 Correct 10 ms 9052 KB Output is correct
41 Incorrect 0 ms 348 KB Output isn't correct
42 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 1116 KB Output is correct
5 Correct 1 ms 1112 KB Output is correct
6 Correct 1 ms 1116 KB Output is correct
7 Correct 1 ms 1116 KB Output is correct
8 Correct 1 ms 1116 KB Output is correct
9 Correct 16 ms 612 KB Output is correct
10 Correct 5 ms 604 KB Output is correct
11 Correct 11 ms 1220 KB Output is correct
12 Correct 10 ms 1248 KB Output is correct
13 Correct 13 ms 1624 KB Output is correct
14 Correct 9 ms 1116 KB Output is correct
15 Correct 3 ms 632 KB Output is correct
16 Correct 10 ms 1104 KB Output is correct
17 Correct 24 ms 2388 KB Output is correct
18 Correct 13 ms 1624 KB Output is correct
19 Correct 1 ms 2908 KB Output is correct
20 Correct 1 ms 2908 KB Output is correct
21 Correct 2 ms 2908 KB Output is correct
22 Correct 1 ms 2904 KB Output is correct
23 Correct 1 ms 2908 KB Output is correct
24 Correct 1 ms 2904 KB Output is correct
25 Correct 2 ms 3160 KB Output is correct
26 Correct 1 ms 2908 KB Output is correct
27 Correct 2 ms 3164 KB Output is correct
28 Correct 2 ms 2908 KB Output is correct
29 Correct 1 ms 2908 KB Output is correct
30 Correct 1 ms 2908 KB Output is correct
31 Correct 2 ms 2904 KB Output is correct
32 Correct 1 ms 2908 KB Output is correct
33 Correct 1 ms 2908 KB Output is correct
34 Correct 14 ms 9052 KB Output is correct
35 Correct 27 ms 9308 KB Output is correct
36 Correct 29 ms 9040 KB Output is correct
37 Correct 42 ms 9096 KB Output is correct
38 Correct 31 ms 9116 KB Output is correct
39 Correct 26 ms 9308 KB Output is correct
40 Correct 8 ms 9048 KB Output is correct
41 Correct 19 ms 9168 KB Output is correct
42 Correct 24 ms 9160 KB Output is correct
43 Correct 9 ms 9052 KB Output is correct
44 Correct 19 ms 9120 KB Output is correct
45 Correct 23 ms 9128 KB Output is correct
46 Correct 25 ms 9040 KB Output is correct
47 Correct 13 ms 9052 KB Output is correct
48 Correct 10 ms 9052 KB Output is correct
49 Incorrect 0 ms 348 KB Output isn't correct
50 Halted 0 ms 0 KB -