leetcode

LeetCode 75 II: Day 14

3 files changed, 45 insertions(+), 0 deletions(-)

diff --git a/ Problems/0016.cpp b/ Problems/0016.cpp

@@ -0,0 +1,20 @@

class Solution {

public:

int threeSumClosest(vector<int> &nums, int target) {

int n = nums.size(), delta = INT_MAX / 2, res = 0;

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

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

int j = i + 1;

int k = n - 1;

while (j < k) {

int sum = nums[i] + nums[j] + nums[k];

if (abs(target - sum) < delta) {

delta = abs(target - sum);

res = sum;

}

(sum > target) ? k-- : j++;

}

}

return res;

}

};

diff --git a/ Problems/0076.cpp b/ Problems/0076.cpp

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

class Solution {

public:

string minWindow(string s, string t) {

vector<int> remaining(128, 0);

for (char c : t) remaining[c]++;

int required = t.size();

int min = INT_MAX, start = 0, left = 0, i = 0;

while (i <= s.size() && start < s.size()) {

if (required) {

if (i == s.size()) break;

if (--remaining[s[i++]] >= 0) required--;

} else {

if (i - start < min) {

min = i - start;

left = start;

}

if (++remaining[s[start++]] > 0) required++;

}

}

return min == INT_MAX ? "" : s.substr(left, min);

}

};

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

@@ -36,6 +36,7 @@ for solving problems. | 0013 | Easy | [Roman to Integer](Problems/0013.cpp) | | 0014 | Easy | [Longest Common Prefix](Problems/0014.cpp) | | 0015 | Medium | [3Sum](Problems/0015.cpp) |

| 0016 | Medium | [3Sum Closest](Problems/0016.cpp) |

| 0017 | Medium | [Letter Combinations of a Phone Number](Problems/0017.cpp) | | 0019 | Medium | [Remove Nth Node From the End of List](Problems/0019.cpp) | | 0020 | Easy | [Valid Parentheses](Problems/0020.cpp) |

@@ -76,6 +77,7 @@ for solving problems. | 0072 | Hard | [Edit Distance](Problems/0072.cpp) | | 0074 | Medium | [Search a 2D Matrix](Problems/0074.cpp) | | 0075 | Medium | [Sort Colors](Problems/0075.cpp) |

| 0076 | Hard | [Minimum Window Substring](Problems/0076.cpp) |

| 0077 | Medium | [Combinations](Problems/0077.cpp) | | 0078 | Medium | [Subsets](Problems/0078.cpp) | | 0079 | Medium | [Word Search](Problems/0079.cpp) |