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#include "leetcode.h"
class Solution {
public:
bool isNStraightHand(vector<int> &hand, int groupSize) {
if (hand.size() % groupSize != 0)
return false;
map<int, int> m;
for (auto &card : hand)
m[card]++;
for (int i = 0; i < groupSize; i++) {
int curr = m.begin()->first;
if (m[curr + i] == 0)
return false;
else if (--m[curr + i] < 1)
m.erase(curr + i);
}
return true;
}
};
int main() {
Solution obj;
vector<int> hand = {1, 2, 3, 6, 2, 3, 4, 7, 8};
int groupSize = 3;
if (obj.isNStraightHand(hand, groupSize))
cout << "true";
else
cout << "false";
}
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