leetcode

1 Random Problem

2 files changed, 44 insertions(+), 0 deletions(-)

diff --git a/ Problems/0638.cpp b/ Problems/0638.cpp

@@ -0,0 +1,43 @@

class Solution {

static bool finished(const vector<int> needs) {

for (const int n : needs)

if (n) return false;

return true;

}

public:

int shoppingOffers(const vector<int> &price, const vector<vector<int>> &special, const vector<int> &needs,

int offer = 0, int cost = 0) const {

if (finished(needs)) return cost;

const int n = size(price);

int res = cost;

for (int i = 0; i < n; i++) {

res += needs[i] * price[i];

}

for (int i = offer; i < size(special); i++) {

int times = INT_MAX;

for (int j = 0; j < n && times; j++) {

if (!special[i][j]) continue;

times = min(times, needs[j] / special[i][j]);

}

if (!times) continue;

vector<int> next = needs;

int added = 0;

for (int k = 1; k <= times; k++) {

added += special[i].back();

if (cost + added >= res) break;

for (int j = 0; j < n; j++)

next[j] -= special[i][j];

res = min(res, shoppingOffers(price, special, next, i + 1, cost + added));

}

}

return res;

}

};

diff --git a/ README.md b/ README.md

@@ -418,6 +418,7 @@ for solving problems. | 0629 | Hard | [K Inverse Pairs Array](Problems/0629.cpp) | | 0636 | Medium | [Exclusive Time of Functions](Problems/0636.cpp) | | 0637 | Easy | [Average of Levels in Binary Tree](Problems/0637.cpp) |

| 0638 | Medium | [Shopping Offers](Problems/0638.cpp) |

| 0641 | Medium | [Design Circular Deque](Problems/0641.cpp) | | 0643 | Easy | [Maximum Average Subarray I](Problems/0643.cpp) | | 0645 | Easy | [Set Mismatch](Problems/0645.cpp) |