import sys
input = sys.stdin.readline
n=int(input())
k=[[[[False for i in range(26)]for j in range(26)]for m in range(26)]for _ in range(26)]
c=[]
t=0
v=[[[0,0]for _ in range(26)]for _ in range(26)]
h=[[[0,0]for _ in range(26)]for _ in range(26)]
for i in range(n):
a=input()
b=input()
a0=ord(a[0])-65
a1=ord(a[1])-65
b0=ord(b[0])-65
b1=ord(b[1])-65
if k[b0][b1][a0][a1]:
t-=1
if k[a1][a0][b1][b0]:
t-=1
if a1==b0:
if a0==b1:
if k[a1][a0][b1][b0]:
t+=3
for j in range(26):
if k[j][a0][a0][b0]:
t-=1
if k[a1][b1][b1][j]:
t-=1
if a0==b1:
for j in range(26):
if k[a1][j][b1][a1]:
t-=1
if k[b0][a0][j][b0]:
t-=1
if a0==a1 and b0==b1:
t-=1
if a0==b0 and a1==b1:
t-=1
k[a0][a1][b0][b1]=True
v[a0][b0][0]+=1
v[a1][b1][1]+=1
h[a0][a1][0]+=1
h[b0][b1][1]+=1
for i in range(26):
for j in range(26):
t+=h[i][j][0]*h[i][j][1]
t+=v[i][j][0]*v[i][j][1]
print(t)
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
51 ms |
23964 KB |
Output is correct |
2 |
Correct |
54 ms |
23916 KB |
Output is correct |
3 |
Correct |
56 ms |
24236 KB |
Output is correct |
4 |
Correct |
61 ms |
24884 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
51 ms |
23964 KB |
Output is correct |
2 |
Correct |
54 ms |
23916 KB |
Output is correct |
3 |
Correct |
56 ms |
24236 KB |
Output is correct |
4 |
Correct |
61 ms |
24884 KB |
Output is correct |
5 |
Correct |
54 ms |
24040 KB |
Output is correct |
6 |
Correct |
57 ms |
24196 KB |
Output is correct |
7 |
Correct |
112 ms |
26296 KB |
Output is correct |
8 |
Correct |
83 ms |
26068 KB |
Output is correct |
9 |
Correct |
104 ms |
26408 KB |
Output is correct |
10 |
Correct |
119 ms |
26116 KB |
Output is correct |
11 |
Correct |
56 ms |
24052 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
702 ms |
33728 KB |
Output is correct |
2 |
Correct |
678 ms |
33872 KB |
Output is correct |
3 |
Correct |
698 ms |
33812 KB |
Output is correct |
4 |
Correct |
632 ms |
33576 KB |
Output is correct |
5 |
Correct |
644 ms |
32808 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
56 ms |
24052 KB |
Output is correct |
2 |
Correct |
119 ms |
26252 KB |
Output is correct |
3 |
Correct |
277 ms |
28192 KB |
Output is correct |
4 |
Correct |
218 ms |
27492 KB |
Output is correct |
5 |
Correct |
226 ms |
27036 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
54 ms |
24040 KB |
Output is correct |
2 |
Correct |
57 ms |
24196 KB |
Output is correct |
3 |
Correct |
112 ms |
26296 KB |
Output is correct |
4 |
Correct |
83 ms |
26068 KB |
Output is correct |
5 |
Correct |
104 ms |
26408 KB |
Output is correct |
6 |
Correct |
119 ms |
26116 KB |
Output is correct |
7 |
Correct |
56 ms |
24052 KB |
Output is correct |
8 |
Correct |
51 ms |
23964 KB |
Output is correct |
9 |
Correct |
54 ms |
23916 KB |
Output is correct |
10 |
Correct |
56 ms |
24236 KB |
Output is correct |
11 |
Correct |
61 ms |
24884 KB |
Output is correct |
12 |
Correct |
702 ms |
33728 KB |
Output is correct |
13 |
Correct |
678 ms |
33872 KB |
Output is correct |
14 |
Correct |
698 ms |
33812 KB |
Output is correct |
15 |
Correct |
632 ms |
33576 KB |
Output is correct |
16 |
Correct |
644 ms |
32808 KB |
Output is correct |
17 |
Correct |
119 ms |
26252 KB |
Output is correct |
18 |
Correct |
277 ms |
28192 KB |
Output is correct |
19 |
Correct |
218 ms |
27492 KB |
Output is correct |
20 |
Correct |
226 ms |
27036 KB |
Output is correct |
21 |
Correct |
265 ms |
29300 KB |
Output is correct |
22 |
Correct |
512 ms |
32040 KB |
Output is correct |
23 |
Correct |
437 ms |
30836 KB |
Output is correct |
24 |
Correct |
466 ms |
31312 KB |
Output is correct |