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Add changes #2

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24 changes: 7 additions & 17 deletions 526.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -8,35 +8,25 @@ class Solution {
values.push_back(i);
}

this->permutate(values, 0, n - 1, quantity);
this->permutate(values, 0, quantity);

return quantity;
}

void permutate(vector<int>& values, int l, int r, int& quantity) {
void permutate(vector<int>& values, int l, int& quantity) {
// Get permutation
if (l == r) {
bool isBeautiful = true;

for (int i = 0; i < values.size(); i++) {
if (values[i] % (i + 1) != 0 && (i + 1) % values[i] != 0) {
isBeautiful = false;
break;
}
}

if (isBeautiful)
quantity++;
if (l == values.size()) {
quantity++;
} else {
for (int i = l; i <= r; i++) {
for (int i = l; i < values.size(); i++) {
// Swap
swap(values[l], values[i]);

// Recursion call
if (values[l] % (l + 1) == 0 || (l + 1) % values[l] == 0)
this->permutate(values, l + 1, r, quantity);
this->permutate(values, l + 1, quantity);

// Backtrack (This step is done because we want to have O(n) on space complexity)
// Backtrack
swap(values[l], values[i]);
}
}
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