leetcode

5 Random Problems

6 files changed, 96 insertions(+), 0 deletions(-)

diff --git a/ Problems/0535.cpp b/ Problems/0535.cpp

@@ -0,0 +1,17 @@

class Solution {

unordered_map<string, int> um;

vector<string> str;

public:

string encode(const string& longUrl) {

if(um.count(longUrl)) return to_string(um[longUrl]);

um.insert({longUrl, str.size()});

str.push_back(longUrl);

return to_string(str.size() - 1);

}

string decode(const string& shortUrl) {

return str[stoi(shortUrl)];

}

};

diff --git a/ Problems/0807.cpp b/ Problems/0807.cpp

@@ -0,0 +1,23 @@

class Solution {

public:

int maxIncreaseKeepingSkyline(const vector<vector<int>>& grid) {

int row[51] = { 0 }, col[51] = { 0 };

int n = grid.size();

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

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

row[i] = max(row[i], grid[i][j]);

col[j] = max(col[j], grid[i][j]);

}

}

int res = 0;

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

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

res += min(row[i], col[j]) - grid[i][j];

}

}

return res;

}

};

diff --git a/ Problems/1476.cpp b/ Problems/1476.cpp

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

class SubrectangleQueries {

vector<vector<int>>& rectangle;

public:

SubrectangleQueries(vector<vector<int>>& rectangle): rectangle(rectangle) {}

void updateSubrectangle(int row1, int col1, int row2, int col2, int newValue) {

for(int i=row1; i<=row2; i++)

for(int j=col1; j<=col2; j++)

rectangle[i][j] = newValue;

}

int getValue(int row, int col) {

return rectangle[row][col];

}

};

diff --git a/ Problems/1828.cpp b/ Problems/1828.cpp

@@ -0,0 +1,16 @@

class Solution {

public:

vector<int> countPoints(const vector<vector<int>>& points, const vector<vector<int>>& queries) {

vector<int> res(queries.size(), 0);

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

int r2 = queries[i][2] * queries[i][2];

for(int j=0; j<points.size(); j++) {

int dx = points[j][0] - queries[i][0];

int dy = points[j][1] - queries[i][1];

if(dx * dx + dy * dy <= r2)

res[i]++;

}

}

return res;

}

};

diff --git a/ Problems/2396.cpp b/ Problems/2396.cpp

@@ -0,0 +1,21 @@

class Solution {

public:

bool isStrictlyPalindromic(int n) { return false; }

};

class Solution {

public:

bool isStrictlyPalindromic(int n) {

string s = "";

for(int base = n - 2, crnt = n; base >= 2; base--, crnt=n) {

s.clear();

do {

s+='0' + crnt%base;

} while((crnt /= base) > 0);

int i = 0, j=s.size() - 1;

while(i < j) if(s[i++] != s[j--]) return false;

}

return true;

}

};

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

@@ -302,6 +302,7 @@ for solving problems. | 0518 | Medium | [Coin Change II](Problems/0518.cpp) | | 0520 | Easy | [Detect Capital](Problems/0520.cpp) | | 0530 | Easy | [Minimum Absolute Difference in BST](Problems/0530.cpp) |

| 0535 | Medium | [Encode and Decode TinyURL](Problems/0532.cpp) |

| 0535 | Medium | [K-diff Pairs in an Array](Problems/0532.cpp) | | 0538 | Medium | [Convert BST to Greater Tree](Problems/0538.cpp) | | 0540 | Medium | [Single Element in a Sorted Array](Problems/0540.cpp) |

@@ -365,6 +366,7 @@ for solving problems. | 0787 | Medium | [Cheapest Flights Within K Stops](Problems/0787.cpp) | | 0797 | Medium | [All Paths From Source to Target](Problems/0797.cpp) | | 0802 | Medium | [Find Eventual Safe States](Problems/0802.cpp) |

| 0807 | Medium | [Max Increase to Keep City Skyline](Problems/0807.cpp) |

| 0808 | Medium | [Soup Servings](Problems/0808.cpp) | | 0815 | Hard | [Bus Routes](Problems/0815.cpp) | | 0830 | Medium | [Kth Smallest Element in a BST](Problems/0230.cpp) |

@@ -495,6 +497,7 @@ for solving problems. | 1466 | Medium | [Reorder Routes to Make All Paths Lead to the City Zero](Problems/1466.cpp) | | 1470 | Easy | [Shuffle the Array](Problems/1470.cpp) | | 1472 | Medium | [Design Browser History ](Problems/1472.cpp) |

| 1476 | Medium | [Subrectangle Queries](Problems/1476.cpp) |

| 1480 | Easy | [Running Sum of 1d Array](Problems/1480.cpp) | | 1489 | Hard | [Find Critical and Pseudo-Critical Edges in Minimum Spanning Tree](Problems/1489.cpp) | | 1491 | Easy | [Average Salary Excluding the Minimum and Maximum Salary](Problems/1491.cpp) |

@@ -541,6 +544,7 @@ for solving problems. | 1802 | Medium | [Maximum Value at a Given Index in a Bounded Array](Problems/1802.cpp) | | 1822 | Easy | [Sign of the Product of an Array](Problems/1822.cpp) | | 1823 | Medium | [Find the Winner of the Circular Game](Problems/1823.cpp) |

| 1828 | Medium | [Queries on Number of Points Inside a Circle](Problems/1828.cpp) |

| 1833 | Medium | [Maximum Ice Cream Bars](Problems/1833.cpp) | | 1834 | Medium | [Single-Threaded CPU](Problems/1834.cpp) | | 1857 | Hard | [Largest Color Value in a Directed Graph](Problems/1857.cpp) |

@@ -595,6 +599,7 @@ for solving problems. | 2368 | Medium | [Reachable Nodes With Restrictions](Problems/2368.cpp) | | 2374 | Medium | [Node With Highest Edge Score](Problems/2374.cpp) | | 2390 | Medium | [Removing Stars From a String](Problems/2390.cpp) |

| 2396 | Medium | [Strictly Palindromic Number](Problems/2396.cpp)

| 2405 | Medium | [Optimal Partition of String](Problems/2405.cpp) | | 2421 | Medium | [Number of Good Paths](Problems/2421.cpp) | | 2439 | Medium | [Minimize Maximum of Array](Problems/2439.cpp) |