0781.cpp (451B)
1 class Solution { 2 static const int size = 1001; 3 4 public: 5 int numRabbits(const vector<int> &answers) const { 6 int count[size]; 7 8 memset(count, 0x00, sizeof(count)); 9 for (const int n : answers) 10 count[n]++; 11 12 int res = count[0]; 13 for (int i = 1; i < size; i++) { 14 if (!count[i]) continue; 15 res += ((count[i] + i) / (i + 1)) * (i + 1); 16 } 17 18 return res; 19 } 20 };