frestuc
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Short and Simple Python solution with Backtracking:
def getMinLengthSubsequence(nums, sub):
def search(nums, sub, startn, starts):
if starts >= len(nums) or startn >= len(nums):
return -1, -1
for idx in range(startn, len(nums)):
if nums[idx] == sub[starts]:
if starts == len(sub) - 1:
return idx, idx
start, end = search(nums, sub, idx + 1, starts + 1)
if start >= 0:
return idx, end
return -1, -1
start, end = 0, float('inf')
for idx in range(len(nums)):
if sub and nums[idx] == sub[0]:
startx, endx = search(nums, sub, idx, 0)
if startx != -1 and endx - startx < end - start:
start, end = startx, endx
return start, end
def advance(nums, counts, i, j, X, Y):
while 0 <= i < j and counts[X] > counts[Y]:
if nums[j] == X:
counts[X] -= 1
j -= 1
else:
if nums[i] == X:
counts[X] -= 1
i += 1
else:
i += 1
j -= 1
return i, j
def largestContainingXandY(nums, X, Y):
counts = collections.Counter(nums)
i, j, res = 0, len(nums) - 1, 0
while i < j:
i, j = advance(nums, counts, i, j, X, Y)
i, j = advance(nums, counts, i, j, Y, X)
if counts[X] == counts[Y]:
res = max(res, j - i + 1)
break
return res
nums = [7, 42, 5, 6, 42, 8, 7,5, 7, 6, 7]
nums1 = [7, 42, 7, 42, 7, 7, 42, 42, 7, 7, 7, 7, 7, 7, 42]
nums2 = [7, 7]
print(largestContainingXandY(nums1, 7, 42))
def longestWithSumLessThanK(nums, k):
counts, i, res = 0, 0, float('-inf')
for j in range(len(nums)):
counts += nums[j]
while i <= j and counts > k:
counts -= nums[i]
i += 1
if counts <= k:
res = max(res, j - i + 1)
return res if res > float('-inf') else None
nums = [1, 1, 1, 2, 1, 1, 1, 4, 4, 1, 2 ,3, 4, 1]
print(longestWithSumLessThanK(nums, 7))
def generate(num):
res, s = [], list(int(x) for x in str(num))
for i in range(0, len(s) - 1):
left = s[:i]
right = s[i+2:]
res += "".join(str(x) for x in left + [max(s[i], s[i+1])] + right),
# I got max 10 digits, so I run maximum 10 times the loop. Each loop takes O(n) time,
# Where n is the length (10). So at the end I have in the worst case a list of 10 elements each one having 10 digits. Getting the minimum will require me 10 comparisons each one taking 10 (I gotta compare every digit).
return min(res)
num = 233614
print(generate(num))
One line in Python:
def check_patterns(words, p):
return [word
for word in words
if len(word) == len(p) and\
len(set(zip(word, p))) == len(set(word)) == len(set(p))
]
words = ["cdf", "too", "hgfdt" ,"paa"]
p = "abc"
p1 = "acc"
print(check_patterns(words, p))
print(check_patterns(words, p1))
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- frestuc August 23, 2016#include <map> #include <vector> #include <string> #include <iostream> #include <sstream> #include <algorithm> using namespace std; map<char, int> vals = { {'I', 1}, {'V', 5}, {'X', 10}, {'L', 50}, {'C', 100}, {'D', 500}, {'M', 1000} }; vector<string> split(const string &s, char delim) { stringstream ss(s); string item; vector<string> tokens; while (getline(ss, item, delim)) { tokens.push_back(item); } return tokens; } int romanToInt(string s){ int res = vals[s[s.size() - 1]]; for (int i = s.size() - 2; i >= 0; i--) { if (vals[s[i]] < vals[s[i+1]]) res -= vals[s[i]]; else res += vals[s[i]]; } return res; } bool comp(string a, string b) { vector<string> s1 = split(a, ' '); vector<string> s2 = split(b, ' '); for (auto s: s1) cout << s << endl; if (s1[0] < s2[0]) return true; if (s1[0] == s2[0] and romanToInt(s1[1]) <= romanToInt(s2[1])) return true; return false; } int main(){ vector<string> names = {"Richard V","Henry VI","Edward II","Richard XXV","Henry IX","Edward LII"}; sort(names.begin(), names.end(), comp); for (auto name: names) cout<< name << '\t'; return 0; }