oj.uz

Submission #679361

# Submission time Handle Problem Language Result Execution time Memory
679361 2023-01-08T07:08:58 Z Chal1shkan Chessboard (IZhO18_chessboard) C++14
47 / 100
 41 ms 12748 KB 
#include <bits/stdc++.h>

# define pb push_back
# define ff first
# define ss second
# define nl "\n"

typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;

const ll maxn = 1e5 + 25;
const ll maxl = 22 + 0;
const ll inf = 2e9 + 0;
const ll mod = 998244353;
const ll dx[] = {-1, 1, 0, 0};
const ll dy[] = {0, 0, -1, 1};

using namespace std;

ll n, k;

struct rect
{
    ll x1, y1, x2, y2;
} q[maxn];

ll pref[1007][1007];

ll get (ll x1, ll y1, ll x2, ll y2)
{
    return pref[x2][y2] - pref[x1 - 1][y2] - pref[x2][y1 - 1] + pref[x1 - 1][y1 - 1];
}

bool prime (ll x)
{
    for (ll i = 2; i * i <= x; ++i)
    {
        if (x % i == 0) return 0;
        if (x % (x / i) == 0) return 0; 
    }
    return 1;
}

ll solve1 (ll len)
{
    ll res1 = 0, res2 = 0;;
    ll cnt = 0;
    for (ll i = 1; i <= n; i += len)
    {
        if (cnt % 2 == 0)
        {
            bool boo = 1;
            for (ll j = 1; j <= n; j += len)
            {
                if (boo)
                {
                    res1 += (len * len) - get(i, j, i + len - 1, j + len - 1);
                    res2 += get(i, j, i + len - 1, j + len - 1);
                }
                else
                {
                    res1 +=  get(i, j, i + len - 1, j + len - 1);
                    res2 += (len * len) - get(i, j, i + len - 1, j + len - 1);
                }
                boo ^= 1;
            }
        }
        else
        {
            bool boo = 1;
            for (ll j = 1; j <= n; j += len)
            {
                if (boo)
                {
                    res1 += get(i, j, i + len - 1, j + len - 1);
                    res2 += (len * len) - get(i, j, i + len - 1, j + len - 1);
                }
                else
                {    
                    res1 += (len * len) - get(i, j, i + len - 1, j + len - 1);
                    res2 +=  get(i, j, i + len - 1, j + len - 1);
                }
                boo ^= 1;
            }
        }
        cnt++;
    }
    return min(res1, res2);
}

void ma1n ()
{
    cin >> n >> k;
    for (ll i = 1; i <= k; ++i)
    {
        cin >> q[i].x1 >> q[i].y1 >> q[i].x2 >> q[i].y2;
    }
    if (prime(n))
    {
        ll cnt0 = 0, cnt1 = 0;
        for (ll i = 1; i <= k; ++i)
        {
            if ((q[i].x1 + q[i].y1) & 1) cnt1++;
            else cnt0++;
        }
        ll ans1 = ((((n + 1) / 2) * ((n + 1) / 2)) + ((n / 2) * (n / 2))) - cnt0 + cnt1;
        ll ans2 = ((((n + 1) / 2) * (n / 2)) + (((n + 1) / 2) * (n / 2))) - cnt1 + cnt0;
        cout << min(ans1, ans2) << nl;
    }
    else if (n <= 1000)
    {
        for (ll i = 1; i <= k; ++i)
        {
            pref[q[i].x1][q[i].y1]++;
        }
        for (ll i = 1; i <= n; ++i)
        {
            for (ll j = 1; j <= n; ++j)
            {
                pref[i][j] += pref[i - 1][j] + pref[i][j - 1] - pref[i - 1][j - 1]; 
            }
        }
        ll ans = n * n;
        for (ll len = 1; len < n; ++len)
        {
            if (n % len == 0)
            {
                ans = min(ans, solve1(len));
            }
        }
        cout << ans << nl;
    }
}

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0); cout.tie(0);
    // freopen("mooyomooyo.in", "r", stdin);
    // freopen("mooyomooyo.out", "w", stdout);
    int ttt = 1;
//  cin >> ttt;
    for (int test = 1; test <= ttt; ++test)
    {
//      cout << "Case " << test << ":" << nl;
        ma1n();
    }
    return 0;
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 724 KB Output is correct
3 Correct 1 ms 724 KB Output is correct
4 Correct 1 ms 724 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 724 KB Output is correct
7 Correct 1 ms 724 KB Output is correct
8 Correct 1 ms 724 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 25 ms 2260 KB Output is correct
2 Correct 6 ms 792 KB Output is correct
3 Correct 11 ms 1488 KB Output is correct
4 Correct 12 ms 1772 KB Output is correct
5 Correct 15 ms 2004 KB Output is correct
6 Correct 14 ms 1384 KB Output is correct
7 Correct 2 ms 468 KB Output is correct
8 Correct 13 ms 1380 KB Output is correct
9 Correct 33 ms 3152 KB Output is correct
10 Correct 16 ms 1832 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 596 KB Output is correct
2 Correct 1 ms 596 KB Output is correct
3 Correct 1 ms 596 KB Output is correct
4 Correct 1 ms 724 KB Output is correct
5 Correct 1 ms 724 KB Output is correct
6 Correct 1 ms 596 KB Output is correct
7 Correct 1 ms 724 KB Output is correct
8 Correct 1 ms 596 KB Output is correct
9 Correct 1 ms 724 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 1 ms 596 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 596 KB Output is correct
14 Correct 1 ms 724 KB Output is correct
15 Correct 1 ms 468 KB Output is correct

Subtask #4
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 596 KB Output is correct
2 Correct 1 ms 596 KB Output is correct
3 Correct 1 ms 596 KB Output is correct
4 Correct 1 ms 724 KB Output is correct
5 Correct 1 ms 724 KB Output is correct
6 Correct 1 ms 596 KB Output is correct
7 Correct 1 ms 724 KB Output is correct
8 Correct 1 ms 596 KB Output is correct
9 Correct 1 ms 724 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 1 ms 596 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 596 KB Output is correct
14 Correct 1 ms 724 KB Output is correct
15 Correct 1 ms 468 KB Output is correct
16 Correct 15 ms 8688 KB Output is correct
17 Correct 21 ms 4300 KB Output is correct
18 Correct 33 ms 12748 KB Output is correct
19 Correct 41 ms 11996 KB Output is correct
20 Correct 35 ms 12536 KB Output is correct
21 Correct 21 ms 4088 KB Output is correct
22 Correct 9 ms 8148 KB Output is correct
23 Correct 18 ms 9940 KB Output is correct
24 Correct 40 ms 12364 KB Output is correct
25 Correct 9 ms 8356 KB Output is correct
26 Correct 23 ms 10492 KB Output is correct
27 Correct 25 ms 11136 KB Output is correct
28 Correct 31 ms 12408 KB Output is correct
29 Correct 9 ms 1872 KB Output is correct
30 Correct 8 ms 8148 KB Output is correct

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 25 ms 2260 KB Output is correct
2 Correct 6 ms 792 KB Output is correct
3 Correct 11 ms 1488 KB Output is correct
4 Correct 12 ms 1772 KB Output is correct
5 Correct 15 ms 2004 KB Output is correct
6 Correct 14 ms 1384 KB Output is correct
7 Correct 2 ms 468 KB Output is correct
8 Correct 13 ms 1380 KB Output is correct
9 Correct 33 ms 3152 KB Output is correct
10 Correct 16 ms 1832 KB Output is correct
11 Correct 1 ms 596 KB Output is correct
12 Correct 1 ms 596 KB Output is correct
13 Correct 1 ms 596 KB Output is correct
14 Correct 1 ms 724 KB Output is correct
15 Correct 1 ms 724 KB Output is correct
16 Correct 1 ms 596 KB Output is correct
17 Correct 1 ms 724 KB Output is correct
18 Correct 1 ms 596 KB Output is correct
19 Correct 1 ms 724 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 1 ms 596 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 596 KB Output is correct
24 Correct 1 ms 724 KB Output is correct
25 Correct 1 ms 468 KB Output is correct
26 Correct 15 ms 8688 KB Output is correct
27 Correct 21 ms 4300 KB Output is correct
28 Correct 33 ms 12748 KB Output is correct
29 Correct 41 ms 11996 KB Output is correct
30 Correct 35 ms 12536 KB Output is correct
31 Correct 21 ms 4088 KB Output is correct
32 Correct 9 ms 8148 KB Output is correct
33 Correct 18 ms 9940 KB Output is correct
34 Correct 40 ms 12364 KB Output is correct
35 Correct 9 ms 8356 KB Output is correct
36 Correct 23 ms 10492 KB Output is correct
37 Correct 25 ms 11136 KB Output is correct
38 Correct 31 ms 12408 KB Output is correct
39 Correct 9 ms 1872 KB Output is correct
40 Correct 8 ms 8148 KB Output is correct
41 Incorrect 26 ms 4808 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 212 KB Output is correct
2 Correct 1 ms 724 KB Output is correct
3 Correct 1 ms 724 KB Output is correct
4 Correct 1 ms 724 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 724 KB Output is correct
7 Correct 1 ms 724 KB Output is correct
8 Correct 1 ms 724 KB Output is correct
9 Correct 25 ms 2260 KB Output is correct
10 Correct 6 ms 792 KB Output is correct
11 Correct 11 ms 1488 KB Output is correct
12 Correct 12 ms 1772 KB Output is correct
13 Correct 15 ms 2004 KB Output is correct
14 Correct 14 ms 1384 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 13 ms 1380 KB Output is correct
17 Correct 33 ms 3152 KB Output is correct
18 Correct 16 ms 1832 KB Output is correct
19 Correct 1 ms 596 KB Output is correct
20 Correct 1 ms 596 KB Output is correct
21 Correct 1 ms 596 KB Output is correct
22 Correct 1 ms 724 KB Output is correct
23 Correct 1 ms 724 KB Output is correct
24 Correct 1 ms 596 KB Output is correct
25 Correct 1 ms 724 KB Output is correct
26 Correct 1 ms 596 KB Output is correct
27 Correct 1 ms 724 KB Output is correct
28 Correct 0 ms 212 KB Output is correct
29 Correct 1 ms 596 KB Output is correct
30 Correct 1 ms 340 KB Output is correct
31 Correct 1 ms 596 KB Output is correct
32 Correct 1 ms 724 KB Output is correct
33 Correct 1 ms 468 KB Output is correct
34 Correct 15 ms 8688 KB Output is correct
35 Correct 21 ms 4300 KB Output is correct
36 Correct 33 ms 12748 KB Output is correct
37 Correct 41 ms 11996 KB Output is correct
38 Correct 35 ms 12536 KB Output is correct
39 Correct 21 ms 4088 KB Output is correct
40 Correct 9 ms 8148 KB Output is correct
41 Correct 18 ms 9940 KB Output is correct
42 Correct 40 ms 12364 KB Output is correct
43 Correct 9 ms 8356 KB Output is correct
44 Correct 23 ms 10492 KB Output is correct
45 Correct 25 ms 11136 KB Output is correct
46 Correct 31 ms 12408 KB Output is correct
47 Correct 9 ms 1872 KB Output is correct
48 Correct 8 ms 8148 KB Output is correct
49 Incorrect 26 ms 4808 KB Output isn't correct
50 Halted 0 ms 0 KB -