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Submission #90283

# Submission time Handle Problem Language Result Execution time Memory
90283 2018-12-21T04:40:41 Z HardNut Chessboard (IZhO18_chessboard) C++17
39 / 100
 66 ms 9488 KB 
#include <bits/stdc++.h>

using namespace std;

const int N = 1e5 + 5;
const long long INF = 1e9 + 5;
const int MAXN = 1e6;
const int base = 317;

typedef long long ll;

const ll bs = 1e5 + 1;
const ll mod = 998244353;

int ans = INF, n, k, xx[N], yy[N];

int calc(int x) {
    int res1 = 0, res2 = 0;
    for (int i = 1; i <= k; i++) {
        if ((xx[i] / x) % 2 == (yy[i] / x) % 2) {
            res1++;
        } else {
            res2++;
        }
    }
    int c1 = (n / x) * (n / x) / 2 * x * x;
    int c2 = n * n - c1;
    return min(c1 - res2 + res1, c2 - res1 + res2);
}

main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cin >> n >> k;
    for (int i = 1; i <= k; i++) {
        cin >> xx[i] >> yy[i] >> xx[i] >> yy[i];
        xx[i]--;
        yy[i]--;
    }
    for (int i = 1; i <= sqrt(n); i++) {
        if (n % i == 0) {
            ans = min(ans, calc(i));
            if (i != 1)
                ans = min(ans, calc(n / i));
        }
    }
    cout << ans;
    return 0;
}
/*

*/

Compilation message

chessboard.cpp:31:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main() {
      ^

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 488 KB Output is correct
3 Correct 2 ms 488 KB Output is correct
4 Correct 2 ms 664 KB Output is correct
5 Correct 2 ms 664 KB Output is correct
6 Correct 2 ms 704 KB Output is correct
7 Correct 2 ms 704 KB Output is correct
8 Correct 1 ms 704 KB Output is correct

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 23 ms 2536 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 2 ms 2536 KB Output is correct
2 Correct 2 ms 2536 KB Output is correct
3 Correct 2 ms 2536 KB Output is correct
4 Correct 2 ms 2536 KB Output is correct
5 Correct 2 ms 2536 KB Output is correct
6 Correct 2 ms 2536 KB Output is correct
7 Correct 2 ms 2536 KB Output is correct
8 Correct 2 ms 2536 KB Output is correct
9 Correct 2 ms 2536 KB Output is correct
10 Correct 2 ms 2536 KB Output is correct
11 Correct 2 ms 2536 KB Output is correct
12 Correct 2 ms 2536 KB Output is correct
13 Correct 2 ms 2536 KB Output is correct
14 Correct 2 ms 2536 KB Output is correct
15 Correct 2 ms 2536 KB Output is correct

Subtask #4
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2536 KB Output is correct
2 Correct 2 ms 2536 KB Output is correct
3 Correct 2 ms 2536 KB Output is correct
4 Correct 2 ms 2536 KB Output is correct
5 Correct 2 ms 2536 KB Output is correct
6 Correct 2 ms 2536 KB Output is correct
7 Correct 2 ms 2536 KB Output is correct
8 Correct 2 ms 2536 KB Output is correct
9 Correct 2 ms 2536 KB Output is correct
10 Correct 2 ms 2536 KB Output is correct
11 Correct 2 ms 2536 KB Output is correct
12 Correct 2 ms 2536 KB Output is correct
13 Correct 2 ms 2536 KB Output is correct
14 Correct 2 ms 2536 KB Output is correct
15 Correct 2 ms 2536 KB Output is correct
16 Correct 10 ms 2892 KB Output is correct
17 Correct 25 ms 3464 KB Output is correct
18 Correct 32 ms 4956 KB Output is correct
19 Correct 59 ms 6216 KB Output is correct
20 Correct 66 ms 7904 KB Output is correct
21 Correct 24 ms 9112 KB Output is correct
22 Correct 2 ms 9112 KB Output is correct
23 Correct 18 ms 9112 KB Output is correct
24 Correct 29 ms 9408 KB Output is correct
25 Correct 5 ms 9408 KB Output is correct
26 Correct 19 ms 9408 KB Output is correct
27 Correct 25 ms 9408 KB Output is correct
28 Correct 32 ms 9488 KB Output is correct
29 Correct 11 ms 9488 KB Output is correct
30 Correct 3 ms 9488 KB Output is correct

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 23 ms 2536 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 488 KB Output is correct
3 Correct 2 ms 488 KB Output is correct
4 Correct 2 ms 664 KB Output is correct
5 Correct 2 ms 664 KB Output is correct
6 Correct 2 ms 704 KB Output is correct
7 Correct 2 ms 704 KB Output is correct
8 Correct 1 ms 704 KB Output is correct
9 Incorrect 23 ms 2536 KB Output isn't correct
10 Halted 0 ms 0 KB -