1 for (int c1
= 3; c1
<= 2 * M
- 1; c1
+= 1) {
2 for (int c3
= c1
- (c1
+ 1) / 2 + 2; c3
<= M
; c3
+= 1)
3 for (int c7
= c1
- (c1
+ 1) / 2 + 1; c7
<= min(c1
- 1, c3
- 1); c7
+= 1)
5 for (int c3
= max(1, -M
+ c1
); c3
<= (c1
+ 1) / 2 - 1; c3
+= 1)
7 for (int c3
= c1
- (c1
+ 1) / 2 + 2; c3
<= M
; c3
+= 1)
8 for (int c7
= c1
- (c1
+ 1) / 2 + 1; c7
<= min(c1
- 1, c3
- 1); c7
+= 1)