LeetCode, GeeksForGeeks Problem of the day solution
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class Solution {
public:
long long getCount(int n) {
// Your code goes here
vector> a(10);
a[0] = {8};
a[1] = {2,4};
a[2] = {1,3,5};
a[3] = {2,6};
a[4] = {1,5,7};
a[5] = {2,4,6,8};
a[6] = {3,5,9};
a[7] = {8,4};
a[8] = {7,9,5,0};
a[9] = {6,8};
vector pre(10, 1);
vector curr(10, 1);
while(--n){
for(int i=0; i<10; i++){
curr[i] = pre[i];
for(auto j : a[i]){
curr[i] += pre[j];
}
}
pre = curr;
}
long long sum = 0;
for(int i=0; i<10; i++){
sum += curr[i];
}
return sum;
}
};
class Solution {
public:
int minIncrementForUnique(vector& nums) {
sort(nums.begin(), nums.end());
int n = nums.size();
int ans=0;
for(int i=1;i
class Solution {
public:
string armstrongNumber(int n) {
int check = n;
int sum = 0;
while(n != 0){
sum += pow(n%10,3);
n = (n-n%10)/10;
}
return (sum==check)?"true":"false";
}
};
class Solution {
public:
int minMovesToSeat(vector& seats, vector& students) {
sort(seats.begin(), seats.end());
sort(students.begin(), students.end());
int n=seats.size();
int ans=0;
for(int i=0;i
class Solution
{
public:
int padovanSequence(int n)
{
//code here
int mod=1e9+7;
int arr[n];
if(n==0 or n==1 or n==2) return 1;
arr[0]=1;
arr[1]=1;
arr[2]=1;
for(int i=3;i<=n;i++)
{
arr[i]=arr[i-2]+arr[i-3];
arr[i]=arr[i]%mod;
}
return arr[n];
}
};
class Solution {
public:
void sortColors(vector& nums) {
int n=nums.size();
int low=0, mid=0, high=n-1;
while(mid<=high){
if(nums[mid]==0){
swap(nums[low], nums[mid]);
low++;
mid++;
}
else if(nums[mid]==1){
mid++;
}
else{
swap(nums[mid], nums[high]);
high--;
}
}
}
};
class Solution {
public:
int countNumberswith4(int n) {
int count = 0;
for (int i = 0; i <= n; i++) {
string str = to_string(i);
size_t found = str.find('4');
if (found != string::npos) count++;
}
return count;
}
};
class Solution {
public:
vector relativeSortArray(vector& arr1, vector& arr2) {
unordered_map mp;
unordered_set s;
vector v;
for(int i : arr1){
mp[i]++;
}
for(int i : arr2){
s.insert(i);
}
for(int i : arr2){
for(int j = 0; j < mp[i]; j++){
v.push_back(i);
}
}
vector b;
for(auto i : mp){
if(!s.count(i.first)){
for(int j = 0; j < i.second; j++){
b.push_back(i.first);
}
}
}
sort(b.begin(), b.end());
for(int i : b){
v.push_back(i);
}
return v;
}
};
class Solution {
public:
long long maxTip(int n, int x, int y, vector &a, vector &b)
{
vector> diff;
for (int i = 0; i < n; i++)
{
diff.push_back({abs(a[i] - b[i]), i});
}
sort(diff.rbegin(), diff.rend());
long long ans = 0;
for (auto it : diff)
{
int i = it.second;
if (x == 0)
{
ans += b[i];
y--;
}
else if (y == 0)
{
ans += a[i];
x--;
}
else
{
if (a[i] > b[i])
{
ans += a[i];
x--;
}
else
{
ans += b[i];
y--;
}
}
//cout << "ans: " << ans << endl;
}
return ans;
}
};
class Solution {
public:
int heightChecker(vector& heights) {
int mismatch = 0;
vector count(101, 0);
for(int i = 0; i < heights.size(); i++) count[heights[i]]++;
int i = 1, j = 0;
while(i < 101){
if(count[i] == 0){
i++;
}
else{
if(i != heights[j]) mismatch++;
j++; count[i]--;
}
}
return mismatch;
}
};
