oj.uz

Submission #90284

# Submission time Handle Problem Language Result Execution time Memory
90284 2018-12-21T04:41:59 Z HardNut Chessboard (IZhO18_chessboard) C++17
39 / 100
 108 ms 2192 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;

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

ll calc(ll x) {
    ll res1 = 0, res2 = 0;
    for (int i = 1; i <= k; i++) {
        if ((xx[i] / x) % 2 == (yy[i] / x) % 2) {
            res1++;
        } else {
            res2++;
        }
    }
    ll c1 = (n / x) * (n / x) / 2 * x * x;
    ll 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 468 KB Output is correct
3 Correct 2 ms 468 KB Output is correct
4 Correct 2 ms 532 KB Output is correct
5 Correct 2 ms 532 KB Output is correct
6 Correct 2 ms 532 KB Output is correct
7 Correct 2 ms 532 KB Output is correct
8 Correct 2 ms 620 KB Output is correct

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 24 ms 1400 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 1400 KB Output is correct
2 Correct 2 ms 1400 KB Output is correct
3 Correct 2 ms 1400 KB Output is correct
4 Correct 2 ms 1400 KB Output is correct
5 Correct 2 ms 1400 KB Output is correct
6 Correct 3 ms 1400 KB Output is correct
7 Correct 2 ms 1400 KB Output is correct
8 Correct 2 ms 1400 KB Output is correct
9 Correct 2 ms 1400 KB Output is correct
10 Correct 2 ms 1400 KB Output is correct
11 Correct 2 ms 1400 KB Output is correct
12 Correct 2 ms 1400 KB Output is correct
13 Correct 2 ms 1400 KB Output is correct
14 Correct 2 ms 1400 KB Output is correct
15 Correct 2 ms 1400 KB Output is correct

Subtask #4
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 1400 KB Output is correct
2 Correct 2 ms 1400 KB Output is correct
3 Correct 2 ms 1400 KB Output is correct
4 Correct 2 ms 1400 KB Output is correct
5 Correct 2 ms 1400 KB Output is correct
6 Correct 3 ms 1400 KB Output is correct
7 Correct 2 ms 1400 KB Output is correct
8 Correct 2 ms 1400 KB Output is correct
9 Correct 2 ms 1400 KB Output is correct
10 Correct 2 ms 1400 KB Output is correct
11 Correct 2 ms 1400 KB Output is correct
12 Correct 2 ms 1400 KB Output is correct
13 Correct 2 ms 1400 KB Output is correct
14 Correct 2 ms 1400 KB Output is correct
15 Correct 2 ms 1400 KB Output is correct
16 Correct 12 ms 1400 KB Output is correct
17 Correct 27 ms 1916 KB Output is correct
18 Correct 37 ms 2116 KB Output is correct
19 Correct 96 ms 2116 KB Output is correct
20 Correct 108 ms 2192 KB Output is correct
21 Correct 26 ms 2192 KB Output is correct
22 Correct 2 ms 2192 KB Output is correct
23 Correct 22 ms 2192 KB Output is correct
24 Correct 34 ms 2192 KB Output is correct
25 Correct 6 ms 2192 KB Output is correct
26 Correct 22 ms 2192 KB Output is correct
27 Correct 31 ms 2192 KB Output is correct
28 Correct 36 ms 2192 KB Output is correct
29 Correct 11 ms 2192 KB Output is correct
30 Correct 3 ms 2192 KB Output is correct

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 24 ms 1400 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 468 KB Output is correct
3 Correct 2 ms 468 KB Output is correct
4 Correct 2 ms 532 KB Output is correct
5 Correct 2 ms 532 KB Output is correct
6 Correct 2 ms 532 KB Output is correct
7 Correct 2 ms 532 KB Output is correct
8 Correct 2 ms 620 KB Output is correct
9 Incorrect 24 ms 1400 KB Output isn't correct
10 Halted 0 ms 0 KB -