Submission #1301167


Source Code Expand

n = input()
D = [tuple(map(int, raw_input().split())) for i in xrange(n)]
if (not D[0][0] == D[1][1] == 0 or not D[0][1] == D[1][0] > 0
        or any(i>1 and (d[0] == 0 or d[1] == 0) for i, d in enumerate(D))):
    print -1
    exit(0)
m = {}
for i, d in enumerate(D):
    m[d] = m.get(d, 0) + 1 if i>0 else 0
P = D[:2]
D.sort()

cnt = 0
for x, y in D:
    if (x+1, y+1) in m:
        cnt += m[x+1, y+1]
        m[x+1, y+1] = 0
    if (x+1, y-1) in m:
        cnt += m[x+1, y-1]
        m[x+1, y-1] = 0

def dfs(x, y, dd, used):
    used.add((x, y))
    for dx, dy in dd:
        nx = x + dx; ny = y + dy
        if (nx, ny) in m and (nx, ny) not in used:
            dfs(nx, ny, dd, used)
usedA = set(); usedB = set()
dfs(P[0][0], P[0][1], [(1, 1), (1, 0), (1, -1)], usedA)
dfs(P[1][0], P[1][1], [(1, 1), (0, 1), (-1, 1)], usedB)
if len(m) == len(usedA) == len(usedB):
    print 2*n - 2 - cnt
else:
    print -1

Submission Info

Submission Time
Task A - Distance Pairs
User yaketake08
Language Python (2.7.6)
Score 0
Code Size 948 Byte
Status RE
Exec Time 509 ms
Memory 24508 KB

Judge Result

Set Name sample All
Score / Max Score 0 / 0 0 / 1500
Status
AC × 2
AC × 22
WA × 6
RE × 7
Set Name Test Cases
sample sample-01.txt, sample-02.txt
All sample-01.txt, sample-02.txt, 01-01.txt, 01-02.txt, 01-03.txt, 01-04.txt, 01-05.txt, 01-06.txt, 01-07.txt, 01-08.txt, 01-09.txt, 01-10.txt, 01-11.txt, 01-12.txt, 01-13.txt, 01-14.txt, 01-15.txt, 01-16.txt, 01-17.txt, 01-18.txt, 01-19.txt, 01-20.txt, 01-21.txt, 01-22.txt, 01-23.txt, 01-24.txt, 01-25.txt, 01-26.txt, 01-27.txt, 01-28.txt, 01-29.txt, 01-30.txt, 01-31.txt, sample-01.txt, sample-02.txt
Case Name Status Exec Time Memory
01-01.txt AC 417 ms 24508 KB
01-02.txt AC 423 ms 10944 KB
01-03.txt AC 11 ms 2696 KB
01-04.txt AC 11 ms 2696 KB
01-05.txt AC 15 ms 2820 KB
01-06.txt WA 232 ms 7428 KB
01-07.txt WA 421 ms 11828 KB
01-08.txt WA 450 ms 11832 KB
01-09.txt WA 437 ms 11068 KB
01-10.txt WA 433 ms 11072 KB
01-11.txt AC 389 ms 12224 KB
01-12.txt AC 405 ms 11764 KB
01-13.txt RE 492 ms 24508 KB
01-14.txt RE 486 ms 24508 KB
01-15.txt RE 486 ms 24508 KB
01-16.txt AC 318 ms 10628 KB
01-17.txt WA 345 ms 10628 KB
01-18.txt AC 321 ms 10628 KB
01-19.txt RE 509 ms 24508 KB
01-20.txt RE 495 ms 19496 KB
01-21.txt RE 492 ms 19600 KB
01-22.txt RE 480 ms 19516 KB
01-23.txt AC 455 ms 11832 KB
01-24.txt AC 455 ms 11832 KB
01-25.txt AC 241 ms 10628 KB
01-26.txt AC 238 ms 10628 KB
01-27.txt AC 259 ms 10628 KB
01-28.txt AC 256 ms 10628 KB
01-29.txt AC 10 ms 2696 KB
01-30.txt AC 10 ms 2696 KB
01-31.txt AC 10 ms 2696 KB
sample-01.txt AC 10 ms 2696 KB
sample-02.txt AC 10 ms 2696 KB