oj.uz

Submission #495270

# Submission time Handle Problem Language Result Execution time Memory
495270 2021-12-18T08:20:11 Z kingline Chessboard (IZhO18_chessboard) C++17
16 / 100
 114 ms 1792 KB 
#include <bits/stdc++.h>
#define pb push_back
#define ios ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define all(data) data.begin() , data.end()
#define endl '\n'
//freopen("nenokku_easy.in", "r", stdin);
//freopen("nenokku_easy.out", "w", stdout);
#define int long long

using namespace std;

typedef long long ll;
const int N = 1e5 + 5;

int n, k, y[N], x[N], pref[1005][1005];

main() {
    /*ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);*/
    cin >> n >> k;
    bool pr = 1;
    for(int i = 2; i <= sqrt(n); i++) {
        if(n % i == 0) pr = 0;
    }
    if(pr) {
        int even = 0, odd = 0;
        for(int i = 1; i <= k; i++) {
            int xx, yy;
            cin >> x[i] >> y[i] >> xx >> yy;
            if(xx % 2 == yy % 2) ++odd;
            else even++;
        }
        int ev = (n * n + 1) / 2, od = (n * n) / 2;
        cout << min(ev - odd + even, od - even + odd);
    } else {
        for(int kk = 1; kk <= k; kk++) {
            int x, y, xx, yy;
            cin >> x >> y >> xx >> yy;
            for(int i = x; i <= xx; i++) {
                for(int j = y; j <= yy; j++) {
                    pref[i][j] = 1;
                }
            }
        }
        for(int i = 1; i <= n; i++) {
            for(int j = 1; j <= n; j++) {
                pref[i][j] += pref[i - 1][j] + pref[i][j - 1] - pref[i - 1][j - 1];
            }
        }
        int ans = n * n;
        for(int z = 1; z <= (n >> 1); z++) {
            if(n % z == 0) {
                bool type = 1;
                int res1 = 0, res2 = 0;
                for(int i = z; i <= n; i += z) {
                    for(int j = z; j <= n; j += z) {
                        if(type) {
                            res1 += pref[i][j] - pref[i][j - z] - pref[i - z][j] + pref[i - z][j - z];
                            res2 += z * z - (pref[i][j] - pref[i][j - z] - pref[i - z][j] + pref[i - z][j - z]);
                        } else {
                            res1 += z * z - (pref[i][j] - pref[i][j - z] - pref[i - z][j] + pref[i - z][j - z]);
                            res2 += pref[i][j] - pref[i][j - z] - pref[i - z][j] + pref[i - z][j - z];
                        }
                        type = 1 - type;
                    }
                }
                ans = min(ans, min(res1, res2));
            }
        }
        cout << ans;
    }
}

/*
5
2 8 5 1 10
5
2 3 5 3
2 5 3 3
1 4 4
2 3 4 2
1 1 2
*/

Compilation message

chessboard.cpp:17:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   17 | main() {
      | ^~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 716 KB Output is correct
3 Correct 1 ms 716 KB Output is correct
4 Correct 1 ms 716 KB Output is correct
5 Correct 0 ms 304 KB Output is correct
6 Correct 1 ms 716 KB Output is correct
7 Correct 1 ms 716 KB Output is correct
8 Correct 1 ms 716 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 71 ms 1372 KB Output is correct
2 Correct 19 ms 708 KB Output is correct
3 Correct 43 ms 1100 KB Output is correct
4 Correct 49 ms 1140 KB Output is correct
5 Correct 59 ms 1316 KB Output is correct
6 Correct 47 ms 908 KB Output is correct
7 Correct 8 ms 440 KB Output is correct
8 Correct 44 ms 892 KB Output is correct
9 Correct 114 ms 1792 KB Output is correct
10 Correct 55 ms 1256 KB Output is correct

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 560 KB Output is correct
2 Correct 1 ms 588 KB Output is correct
3 Correct 1 ms 588 KB Output is correct
4 Correct 2 ms 588 KB Output is correct
5 Correct 1 ms 588 KB Output is correct
6 Incorrect 1 ms 588 KB Output isn't correct
7 Halted 0 ms 0 KB -

Subtask #4
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 560 KB Output is correct
2 Correct 1 ms 588 KB Output is correct
3 Correct 1 ms 588 KB Output is correct
4 Correct 2 ms 588 KB Output is correct
5 Correct 1 ms 588 KB Output is correct
6 Incorrect 1 ms 588 KB Output isn't correct
7 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 71 ms 1372 KB Output is correct
2 Correct 19 ms 708 KB Output is correct
3 Correct 43 ms 1100 KB Output is correct
4 Correct 49 ms 1140 KB Output is correct
5 Correct 59 ms 1316 KB Output is correct
6 Correct 47 ms 908 KB Output is correct
7 Correct 8 ms 440 KB Output is correct
8 Correct 44 ms 892 KB Output is correct
9 Correct 114 ms 1792 KB Output is correct
10 Correct 55 ms 1256 KB Output is correct
11 Correct 1 ms 560 KB Output is correct
12 Correct 1 ms 588 KB Output is correct
13 Correct 1 ms 588 KB Output is correct
14 Correct 2 ms 588 KB Output is correct
15 Correct 1 ms 588 KB Output is correct
16 Incorrect 1 ms 588 KB Output isn't correct
17 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 716 KB Output is correct
3 Correct 1 ms 716 KB Output is correct
4 Correct 1 ms 716 KB Output is correct
5 Correct 0 ms 304 KB Output is correct
6 Correct 1 ms 716 KB Output is correct
7 Correct 1 ms 716 KB Output is correct
8 Correct 1 ms 716 KB Output is correct
9 Correct 71 ms 1372 KB Output is correct
10 Correct 19 ms 708 KB Output is correct
11 Correct 43 ms 1100 KB Output is correct
12 Correct 49 ms 1140 KB Output is correct
13 Correct 59 ms 1316 KB Output is correct
14 Correct 47 ms 908 KB Output is correct
15 Correct 8 ms 440 KB Output is correct
16 Correct 44 ms 892 KB Output is correct
17 Correct 114 ms 1792 KB Output is correct
18 Correct 55 ms 1256 KB Output is correct
19 Correct 1 ms 560 KB Output is correct
20 Correct 1 ms 588 KB Output is correct
21 Correct 1 ms 588 KB Output is correct
22 Correct 2 ms 588 KB Output is correct
23 Correct 1 ms 588 KB Output is correct
24 Incorrect 1 ms 588 KB Output isn't correct
25 Halted 0 ms 0 KB -