## Submission #202244

# Submission time Handle Problem Language Result Execution time Memory
202244 2020-02-14T13:43:16 Z ZwariowanyMarcin Chessboard (IZhO18_chessboard) C++14
100 / 100
873 ms 4352 KB
```#include <bits/stdc++.h>
#define LL long long
#define pb push_back
#define make_pair
#define ss(x) (int) x.size()
#define fi first
#define se second
#define cat(x) cerr << #x << " = " << x << endl

using namespace std;

const int nax = 1e5 + 11;
const LL INF = 1e18;

int n, k;
LL best = INF;

struct pt {
int x, y, xx, yy;
};

pt t[nax];

LL rec(int bok, int x, int y) {
LL X = x / bok;
LL Y = y / bok;
LL black = 0;
if (X % 2 == 0 || Y % 2 == 0) {
black += (LL) X * Y / 2 * bok * bok;
}
else {
black += (LL) ((X * Y) / 2 + 1) * bok * bok;
}
if (X % 2 == Y % 2) {
black += (LL) (x - X * bok) * (y - Y * bok);
}
if (Y % 2 == 0) {
black += (LL) (X + 1) / 2 * (y - Y * bok) * bok;
}
else {
black += (LL) X / 2 * (y - Y * bok) * bok;
}
if (X % 2 == 0) {
black += (LL) (Y + 1) / 2 * (x - X * bok) * bok;
}
else {
black += (LL) Y / 2 * (x - X * bok) * bok;
}
return black;
}

void solve(int bok) {
LL sum = 0;
LL pole = 0;
for (int i = 0; i < k; ++i) {
sum += rec(bok, t[i].xx, t[i].yy) - rec(bok, t[i].x - 1, t[i].yy) - rec(bok, t[i].xx, t[i].y - 1) + rec(bok, t[i].x - 1, t[i].y - 1);
pole += (LL) (t[i].xx - t[i].x + 1) * (t[i].yy - t[i].y + 1);
}
LL black = rec(bok, n, n);
LL white = (LL) n * n - black;
/*if (bok == 2) {
cat(rec(2, t[0].x - 1, t[0].yy));
cat(black);
cat(white);
cat(sum);
cat(pole);
}
*/
best = min(best, (black - sum) + (pole - sum));
best = min(best, (white - (pole - sum)) + sum);
}

int main() {
scanf ("%d%d", &n, &k);
for (int i = 0; i < k; ++i)
scanf ("%d %d %d %d", &t[i].x, &t[i].y, &t[i].xx, &t[i].yy);

for (int i = 1; i < n; ++i)
if (n % i == 0) solve(i);

printf ("%lld", best);

return 0;
}
```

### Compilation message

```chessboard.cpp: In function 'int main()':
chessboard.cpp:75:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf ("%d%d", &n, &k);
~~~~~~^~~~~~~~~~~~~~~~
chessboard.cpp:77:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf ("%d %d %d %d", &t[i].x, &t[i].y, &t[i].xx, &t[i].yy);
~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~```

#### Subtask #1 8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 256 KB Output is correct
2 Correct 5 ms 256 KB Output is correct
3 Correct 5 ms 256 KB Output is correct
4 Correct 5 ms 256 KB Output is correct
5 Correct 5 ms 376 KB Output is correct
6 Correct 5 ms 256 KB Output is correct
7 Correct 5 ms 380 KB Output is correct
8 Correct 5 ms 256 KB Output is correct

#### Subtask #2 8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 39 ms 1272 KB Output is correct
2 Correct 14 ms 892 KB Output is correct
3 Correct 28 ms 1912 KB Output is correct
4 Correct 27 ms 1912 KB Output is correct
5 Correct 35 ms 2468 KB Output is correct
6 Correct 24 ms 1656 KB Output is correct
7 Correct 9 ms 632 KB Output is correct
8 Correct 24 ms 1656 KB Output is correct
9 Correct 55 ms 3832 KB Output is correct
10 Correct 34 ms 2296 KB Output is correct

#### Subtask #3 15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 256 KB Output is correct
2 Correct 5 ms 256 KB Output is correct
3 Correct 5 ms 256 KB Output is correct
4 Correct 5 ms 248 KB Output is correct
5 Correct 5 ms 376 KB Output is correct
6 Correct 5 ms 256 KB Output is correct
7 Correct 5 ms 376 KB Output is correct
8 Correct 5 ms 376 KB Output is correct
9 Correct 5 ms 376 KB Output is correct
10 Correct 7 ms 256 KB Output is correct
11 Correct 5 ms 380 KB Output is correct
12 Correct 5 ms 256 KB Output is correct
13 Correct 5 ms 376 KB Output is correct
14 Correct 5 ms 376 KB Output is correct
15 Correct 5 ms 376 KB Output is correct

#### Subtask #4 16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 256 KB Output is correct
2 Correct 5 ms 256 KB Output is correct
3 Correct 5 ms 256 KB Output is correct
4 Correct 5 ms 248 KB Output is correct
5 Correct 5 ms 376 KB Output is correct
6 Correct 5 ms 256 KB Output is correct
7 Correct 5 ms 376 KB Output is correct
8 Correct 5 ms 376 KB Output is correct
9 Correct 5 ms 376 KB Output is correct
10 Correct 7 ms 256 KB Output is correct
11 Correct 5 ms 380 KB Output is correct
12 Correct 5 ms 256 KB Output is correct
13 Correct 5 ms 376 KB Output is correct
14 Correct 5 ms 376 KB Output is correct
15 Correct 5 ms 376 KB Output is correct
16 Correct 21 ms 760 KB Output is correct
17 Correct 45 ms 1656 KB Output is correct
18 Correct 61 ms 1912 KB Output is correct
19 Correct 182 ms 1784 KB Output is correct
20 Correct 206 ms 2008 KB Output is correct
21 Correct 41 ms 1656 KB Output is correct
22 Correct 5 ms 376 KB Output is correct
23 Correct 39 ms 1016 KB Output is correct
24 Correct 56 ms 1656 KB Output is correct
25 Correct 12 ms 504 KB Output is correct
26 Correct 37 ms 1144 KB Output is correct
27 Correct 52 ms 1400 KB Output is correct
28 Correct 63 ms 1784 KB Output is correct
29 Correct 19 ms 888 KB Output is correct
30 Correct 6 ms 376 KB Output is correct

#### Subtask #5 23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 39 ms 1272 KB Output is correct
2 Correct 14 ms 892 KB Output is correct
3 Correct 28 ms 1912 KB Output is correct
4 Correct 27 ms 1912 KB Output is correct
5 Correct 35 ms 2468 KB Output is correct
6 Correct 24 ms 1656 KB Output is correct
7 Correct 9 ms 632 KB Output is correct
8 Correct 24 ms 1656 KB Output is correct
9 Correct 55 ms 3832 KB Output is correct
10 Correct 34 ms 2296 KB Output is correct
11 Correct 5 ms 256 KB Output is correct
12 Correct 5 ms 256 KB Output is correct
13 Correct 5 ms 256 KB Output is correct
14 Correct 5 ms 248 KB Output is correct
15 Correct 5 ms 376 KB Output is correct
16 Correct 5 ms 256 KB Output is correct
17 Correct 5 ms 376 KB Output is correct
18 Correct 5 ms 376 KB Output is correct
19 Correct 5 ms 376 KB Output is correct
20 Correct 7 ms 256 KB Output is correct
21 Correct 5 ms 380 KB Output is correct
22 Correct 5 ms 256 KB Output is correct
23 Correct 5 ms 376 KB Output is correct
24 Correct 5 ms 376 KB Output is correct
25 Correct 5 ms 376 KB Output is correct
26 Correct 21 ms 760 KB Output is correct
27 Correct 45 ms 1656 KB Output is correct
28 Correct 61 ms 1912 KB Output is correct
29 Correct 182 ms 1784 KB Output is correct
30 Correct 206 ms 2008 KB Output is correct
31 Correct 41 ms 1656 KB Output is correct
32 Correct 5 ms 376 KB Output is correct
33 Correct 39 ms 1016 KB Output is correct
34 Correct 56 ms 1656 KB Output is correct
35 Correct 12 ms 504 KB Output is correct
36 Correct 37 ms 1144 KB Output is correct
37 Correct 52 ms 1400 KB Output is correct
38 Correct 63 ms 1784 KB Output is correct
39 Correct 19 ms 888 KB Output is correct
40 Correct 6 ms 376 KB Output is correct
41 Correct 167 ms 3576 KB Output is correct
42 Correct 87 ms 4088 KB Output is correct
43 Correct 107 ms 3576 KB Output is correct
44 Correct 69 ms 3960 KB Output is correct
45 Correct 61 ms 4220 KB Output is correct
46 Correct 189 ms 3960 KB Output is correct
47 Correct 55 ms 3832 KB Output is correct
48 Correct 89 ms 3832 KB Output is correct
49 Correct 65 ms 3704 KB Output is correct
50 Correct 777 ms 3960 KB Output is correct
51 Correct 841 ms 4352 KB Output is correct
52 Correct 780 ms 4104 KB Output is correct
53 Correct 830 ms 4216 KB Output is correct
54 Correct 788 ms 3832 KB Output is correct
55 Correct 862 ms 4344 KB Output is correct
56 Correct 740 ms 3816 KB Output is correct

#### Subtask #6 30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 256 KB Output is correct
2 Correct 5 ms 256 KB Output is correct
3 Correct 5 ms 256 KB Output is correct
4 Correct 5 ms 256 KB Output is correct
5 Correct 5 ms 376 KB Output is correct
6 Correct 5 ms 256 KB Output is correct
7 Correct 5 ms 380 KB Output is correct
8 Correct 5 ms 256 KB Output is correct
9 Correct 39 ms 1272 KB Output is correct
10 Correct 14 ms 892 KB Output is correct
11 Correct 28 ms 1912 KB Output is correct
12 Correct 27 ms 1912 KB Output is correct
13 Correct 35 ms 2468 KB Output is correct
14 Correct 24 ms 1656 KB Output is correct
15 Correct 9 ms 632 KB Output is correct
16 Correct 24 ms 1656 KB Output is correct
17 Correct 55 ms 3832 KB Output is correct
18 Correct 34 ms 2296 KB Output is correct
19 Correct 5 ms 256 KB Output is correct
20 Correct 5 ms 256 KB Output is correct
21 Correct 5 ms 256 KB Output is correct
22 Correct 5 ms 248 KB Output is correct
23 Correct 5 ms 376 KB Output is correct
24 Correct 5 ms 256 KB Output is correct
25 Correct 5 ms 376 KB Output is correct
26 Correct 5 ms 376 KB Output is correct
27 Correct 5 ms 376 KB Output is correct
28 Correct 7 ms 256 KB Output is correct
29 Correct 5 ms 380 KB Output is correct
30 Correct 5 ms 256 KB Output is correct
31 Correct 5 ms 376 KB Output is correct
32 Correct 5 ms 376 KB Output is correct
33 Correct 5 ms 376 KB Output is correct
34 Correct 21 ms 760 KB Output is correct
35 Correct 45 ms 1656 KB Output is correct
36 Correct 61 ms 1912 KB Output is correct
37 Correct 182 ms 1784 KB Output is correct
38 Correct 206 ms 2008 KB Output is correct
39 Correct 41 ms 1656 KB Output is correct
40 Correct 5 ms 376 KB Output is correct
41 Correct 39 ms 1016 KB Output is correct
42 Correct 56 ms 1656 KB Output is correct
43 Correct 12 ms 504 KB Output is correct
44 Correct 37 ms 1144 KB Output is correct
45 Correct 52 ms 1400 KB Output is correct
46 Correct 63 ms 1784 KB Output is correct
47 Correct 19 ms 888 KB Output is correct
48 Correct 6 ms 376 KB Output is correct
49 Correct 167 ms 3576 KB Output is correct
50 Correct 87 ms 4088 KB Output is correct
51 Correct 107 ms 3576 KB Output is correct
52 Correct 69 ms 3960 KB Output is correct
53 Correct 61 ms 4220 KB Output is correct
54 Correct 189 ms 3960 KB Output is correct
55 Correct 55 ms 3832 KB Output is correct
56 Correct 89 ms 3832 KB Output is correct
57 Correct 65 ms 3704 KB Output is correct
58 Correct 777 ms 3960 KB Output is correct
59 Correct 841 ms 4352 KB Output is correct
60 Correct 780 ms 4104 KB Output is correct
61 Correct 830 ms 4216 KB Output is correct
62 Correct 788 ms 3832 KB Output is correct
63 Correct 862 ms 4344 KB Output is correct
64 Correct 740 ms 3816 KB Output is correct
65 Correct 5 ms 376 KB Output is correct
66 Correct 5 ms 256 KB Output is correct
67 Correct 819 ms 4092 KB Output is correct
68 Correct 813 ms 4088 KB Output is correct
69 Correct 713 ms 3704 KB Output is correct
70 Correct 786 ms 3952 KB Output is correct
71 Correct 781 ms 3960 KB Output is correct
72 Correct 757 ms 3832 KB Output is correct
73 Correct 749 ms 3832 KB Output is correct
74 Correct 809 ms 4088 KB Output is correct
75 Correct 781 ms 3960 KB Output is correct
76 Correct 843 ms 4216 KB Output is correct
77 Correct 161 ms 4216 KB Output is correct
78 Correct 69 ms 3832 KB Output is correct
79 Correct 110 ms 3832 KB Output is correct
80 Correct 131 ms 3832 KB Output is correct
81 Correct 108 ms 3652 KB Output is correct
82 Correct 93 ms 3960 KB Output is correct
83 Correct 79 ms 3832 KB Output is correct
84 Correct 538 ms 4092 KB Output is correct
85 Correct 862 ms 4216 KB Output is correct
86 Correct 6 ms 256 KB Output is correct
87 Correct 5 ms 376 KB Output is correct
88 Correct 873 ms 4216 KB Output is correct
89 Correct 171 ms 1016 KB Output is correct
90 Correct 5 ms 376 KB Output is correct