leetcode

5 Random Problems

6 files changed, 65 insertions(+), 0 deletions(-)

diff --git a/ Problems/1347.cpp b/ Problems/1347.cpp

@@ -0,0 +1,14 @@

class Solution {

public:

int minSteps(const string &s, const string &t) {

int res = 0, count[27] = {0};

for (int i = 0; i < s.size(); i++) {

count[s[i] & 0x1F]++;

count[t[i] & 0x1F]--;

}

for (int i = 1; i < 27; i++) {

if (count[i] > 0) res += count[i];

}

return res;

}

};

diff --git a/ Problems/1561.cpp b/ Problems/1561.cpp

@@ -0,0 +1,13 @@

class Solution {

public:

int maxCoins(vector<int> &piles) {

sort(piles.begin(), piles.end());

int res = 0;

for (int i = piles.size() / 3; i < piles.size(); i += 2) {

res += piles[i];

}

return res;

}

};

diff --git a/ Problems/2221.cpp b/ Problems/2221.cpp

@@ -0,0 +1,11 @@

class Solution {

public:

int triangularSum(vector<int> &nums) {

for (int k = 0; k < nums.size() - 1; k++) {

for (int i = 1; i < nums.size() - k; i++) {

nums[i - 1] = (nums[i - 1] + nums[i]) % 10;

}

}

return nums.front();

}

};

diff --git a/ Problems/2317.cpp b/ Problems/2317.cpp

@@ -0,0 +1,8 @@

class Solution {

public:

int maximumXOR(vector<int> &nums) {

int res = 0;

for (const int n : nums) res |= n;

return res;

}

};

diff --git a/ Problems/2442.cpp b/ Problems/2442.cpp

@@ -0,0 +1,14 @@

class Solution {

public:

int countDistinctIntegers(const vector<int> &nums) {

unordered_set<int> us(nums.begin(), nums.end());

for (int n : nums) {

int rev = 0;

while (n % 10 == 0) n /= 10;

do rev = (rev * 10) + n % 10;

while ((n /= 10) > 0);

us.insert(rev);

}

return us.size();

}

};

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

@@ -477,6 +477,7 @@ for solving problems. | 1342 | Easy | [Number of Steps to Reduce a Number to Zero](Problems/1342.cpp) | | 1345 | Hard | [Jump Game IV](Problems/1345.cpp) | | 1346 | Easy | [Check if N and Its Double Exist](Problems/1346.cpp) |

| 1347 | Medium | [Minimum Number of Steps to Make Two Strings Anagram](Problems/1347.cpp) |

| 1351 | Easy | [Count Negative Numbers in a Sorted Matrix](Problems/1351.cpp) | | 1361 | Medium | [Validate Binary Tree Nodes](Problems/1361.cpp) | | 1367 | Medium | [Linked List in Binary Tree ](Problems/1367.cpp) |

@@ -516,6 +517,7 @@ for solving problems. | 1547 | Hard | [Minimum Cost to Cut a Stick](Problems/1547.cpp) | | 1551 | Medium | [Minimum Operations to Make Array Equal](Problems/1551.cpp) | | 1557 | Medium | [Minimum Number of Vertices to Reach All Nodes](Problems/1557.cpp) |

| 1561 | Medium | [Maximum Number of Coins You Can Get](Problems/1561.cpp) |

| 1567 | Medium | [Maximum Length of Subarray With Positive Product](Problems/1567.cpp) | | 1569 | Hard | [Number of Ways to Reorder Array to Get Same BST](Problems/1569.cpp) | | 1572 | Easy | [Matrix Diagonal Sum](Problems/1572.cpp) |

@@ -589,6 +591,7 @@ for solving problems. | 2192 | Medium | [All Ancestors of a Node in a Directed Acyclic Graph](Problems/2192.cpp) | | 2215 | Easy | [Find the Difference of Two Arrays](Problems/2215.cpp) | | 2218 | Hard | [Maximum Value of K Coins From Piles](Problems/2218.cpp) |

| 2221 | Medium | [Find Triangular Sum of an Array](Problems/2221.cpp) |

| 2235 | Easy | [Add Two Integers](Problems/2235.cpp) | | 2236 | Easy | [Root Equals Sum of Children](Problems/2236.cpp) | | 2243 | Easy | [Calculate Digit Sum of a String](Problems/2243.cpp) |

@@ -602,6 +605,7 @@ for solving problems. | 2305 | Medium | [Fair Distribution of Cookies](Problems/2305.cpp) | | 2306 | Hard | [Naming a Company](Problems/2306.cpp) | | 2316 | Medium | [Count Unreachable Pairs of Nodes in an Undirected Graph](Problems/2316.cpp) |

| 2317 | Medium | [Maximum XOR After Operations](Problems/2317.cpp) |

| 2326 | Medium | [Spiral Matrix IV](Problems/2326.cpp) | | 2328 | Hard | [Number of Increasing Paths in a Grid](Problems/2328.cpp) | | 2331 | Easy | [Evaluate Boolean Binary Tree](Problems/2331.cpp) |

@@ -621,6 +625,7 @@ for solving problems. | 2421 | Medium | [Number of Good Paths](Problems/2421.cpp) | | 2433 | Medium | [Find The Original Array of Prefix Xor](Problems/2433.cpp) | | 2439 | Medium | [Minimize Maximum of Array](Problems/2439.cpp) |

| 2442 | Medium | [Count Number of Distinct Integers After Reverse Operations](Problems/2442.cpp) |

| 2444 | Hard | [Count Subarrays With Fixed Bounds](Problems/2444.cpp) | | 2448 | Hard | [Minimum Cost to Make Array Equal](Problems/2448.cpp) | | 2461 | Medium | [Maximum Sum of Distinct Subarrays With Length K](Problems/2461.cpp) |