blob: 3a7d0da3e8336f51d3eed1dc57696f9c714c1138 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
#include <stdio.h>
#include <string.h>
#include <math.h>
int inside[101][101];
int __inside(int a, int b)
{
int count = 0;
/* y = -a/b * x + a */
for (int i = 1; i < b; i++) {
int t = a - (i * a) / b - 1;
if (t > 0)
count += t;
}
return count;
}
void init()
{
for (int i = 1; i <= 100; i++) {
for (int j = i; j <= 100; j++) {
inside[i][j] = __inside(i, j);
}
}
}
int ninside(int a, int b)
{
if (a <= b)
return inside[a][b];
else
return inside[b][a];
}
int issqr(int x)
{
int sx = sqrt(x);
if (sx * sx == x)
return 1;
else
return 0;
}
int main()
{
int a, b, c, d;
int m;
int nsqr = 0;
init();
scanf("%d", &m);
for (a = 1; a <= m; a++) {
for (b = 1; b <= m; b++) {
for (c = a; c <= m; c++) {
for (d = b; d <= m; d++) {
int count = ninside(a, b) + ninside(a, d)
+ ninside(c, b) + ninside(c, d)
+ a + b + c + d - 3;
if (issqr(count)) {
if (a == c && b == d) {
nsqr++;
} else if (a == c || b == d) {
nsqr += 2;
} else {
nsqr += 4;
}
}
}
}
}
}
printf("%d\n", nsqr);
}
|