Created
July 10, 2017 16:16
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from operator import itemgetter | |
nums = [int(x) for x in input().split()] | |
R,C,K = nums[0],nums[1],nums[2] | |
N = int(input()) | |
Sx = [0 for i in range(R)] | |
Sy = [0 for i in range(C)] | |
''' | |
thanks to: | |
http://abc023.contest.atcoder.jp/submissions/1321118 | |
''' | |
if __name__ == '__main__': | |
L = [] | |
for i in range(N): | |
nums = [int(x) for x in input().split()] | |
r,c = nums[0]-1,nums[1]-1 | |
L.append((r,c)) | |
Sx[r] += 1 | |
Sy[c] += 1 | |
Sx2 = sorted([(j,i) for i,j in enumerate(Sx) if j <= K], key = itemgetter(0)) | |
Sy2 = sorted([(j,i) for i,j in enumerate(Sy) if j <= K], key = itemgetter(0), reverse=1) | |
result = 0 | |
for i in range(K+1): | |
r,c = 0,0 | |
while Sx2 and Sx2[-1][0] == K-i: | |
Sx2.pop() | |
r += 1 | |
while Sy2 and Sy2[-1][0] == i: | |
Sy2.pop() | |
c += 1 | |
result += r * c | |
for l in L: | |
s = Sx[l[0]] + Sy[l[1]] | |
result += -1 if s==K else 1 if s==K+1 else 0 | |
print(result) |
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