leetcode

LeetCode 75 II: Day 1

2 files changed, 15 insertions(+), 0 deletions(-)

diff --git a/ Problems/0202.cpp b/ Problems/0202.cpp

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

class Solution {

public:

bool isHappy(int n) {

unordered_set<int> seen;

int tmp;

while (n != 1 && !seen.count(n)) {

seen.insert(n);

tmp = n, n = 0;

do { n += (tmp % 10) * (tmp % 10); } while ((tmp /= 10) > 0);

}

return !seen.count(n);

}

};

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

@@ -128,6 +128,7 @@ for solving problems. | 0198 | Medium | [House Robber](Problems/0198.cpp) | | 0199 | Medium | [Binary Tree Right Side View](Problems/0199.cpp) | | 0200 | Medium | [Number of Islands](Problems/0200.cpp) |

| 0202 | Easy | [Happy Number](Problems/0202.cpp) |

| 0203 | Easy | [Remove Linked List Elements](Problems/0203.cpp) | | 0205 | Easy | [Isomorphic Strings](Problems/0205.cpp) | | 0206 | Easy | [Reverse Linked List](Problems/0206.cpp) |