void nLetterTriangle(int n) {
// Write your code here.
for(int i=0; i<n; i++){
for(char ch='A'; ch<'A' + (n-i); ch++){
cout<<ch<<" ";
}
cout<<endl;
}
}
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Reverse Letter Triangle
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Problem statement
Aryan and his friends are very fond of patterns. For a given integer ‘N’, they want to make the Reverse Letter Triangle.
You must print a matrix corresponding to the given Reverse Letter Triangle.
Example:Input: ‘N’ = 3
Output:
A B C
A B
A
Detailed explanation ( Input/output format, Notes, Images )
Input Format:
The first line contains an integer ‘N’.
Print a 2D array of characters that represents the Reverse Letter Triangle.
Constraints :
1 <= N <= 20
Time Limit: 1 sec
Sample Input 1:
3
Sample Output 1:
A B C
A B
A
Sample Input 2 :
4
Sample Output 2 :
A B C D
A B C
A B
A
Sample Input 3 :
7
Sample Output 3 :
A B C D E F G
A B C D E F
A B C D E
A B C D
A B C
A B
A
Hint
Hint 1
Iterate to all the cells and fill the cells in an increasing sequence of letters.
Approaches (1)
Approach 1
Brute Force
Approach:
The steps are as follows :
Function (void) nLetterTriangle(int ‘N’)
- Int ‘num’ = ‘N’
- for ‘i’ from 0 to ‘N’-1:
- char ‘ch’=’A’.
- for j from 0 to ‘num’-1:
- Print ‘ch’
- ch++
- End the current line.
- ‘num’--
Time Complexity
O( N * N )
Two nested loops are running N * N times so that time complexity would be the order of N * N.
Hence the time complexity is O( N * N ).
Space Complexity
O(1)
No extra space is used as we are just printing the pattern.
Code Solution
(100% EXP penalty)
Reverse Letter Triangle
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Interview problems
Using ASCII || Python3
def nLetterTriangle(n: int):
base = 64
for i in range(n,0,-1):
for j in range(1,i+1):
print(chr(base+j),end=" ")
print()
pass
7 views
0 replies
0 upvotes
Interview problems
c++ code
void nLetterTriangle(int n) {
for(int i=0;i<n;i++){
char ch = 'A';
for(int j=0;j<n-i;j++){
cout<<ch<<" ";
ch++;
}
cout<<endl;
}
} 15 views
0 replies
0 upvotes
Interview problems
nletterTriangle
void nLetterTriangle(int n) {
// Write your code here.
for(int i=0;i<n;i++){
for(int j=0;j<n-i;j++){
cout<<char(65+j)<<" ";
}
cout<<endl;
}
}
3 views
0 replies
0 upvotes
Interview problems
Java Code
public class Solution {
public static void nLetterTriangle(int n) {
// Write your code here
for(int i=0;i<n;i++){
for(char ch='A';ch<='A'+(n-i-1);ch++){
System.out.print(ch+" ");
}
System.out.println();
}
}
}
25 views
0 replies
0 upvotes
Interview problems
Reverse Letter Triangle
def nLetterTriangle(n: int):
# Write your solution here.
for i in range(n,0,-1):
for j in range(i):
print(chr(ord('A')+j),end=" ")
print()
pass
4 views
0 replies
0 upvotes
Interview problems
java
public class Solution {
public static void nLetterTriangle(int n) {
// Write your code here
int x=n;
for(int i=1;i<=n;i++){
char start ='A';
for(int j=1;j<=x;j++){
System.out.print(start+ " ");
start++;
}
x--;
System.out.println();
}
}
}
5 views
0 replies
0 upvotes
Interview problems
java code
public class Solution {
public static void nLetterTriangle(int n) {
// Write your code here
for(int i=n;i>=1;i--){
int count=65;
for(int j=1;j<=i;j++){
System.out.print((char)count+" ");
count++;
}
System.out.println();
}
}
}
9 views
0 replies
0 upvotes
Interview problems
Reverse Triangle C++ Solution
void nLetterTriangle(int n) {
// Write your code here.
for(int i =n;i>0;i--){
for(char ch = 'A';ch <= 'A'+i-1;ch++){
cout<<ch<<" ";
}
cout<<endl;
}
}
16 views
0 replies
1 upvote
Interview problems
Reverse Letter Triangle
void nLetterTriangle(int n) {
for(int i = n; i>=1; i--){
for(char ch = 'A'; ch<'A'+i; ch++){
cout<<ch<<" ";
}
cout<<endl;
}
}
18 views
0 replies
0 upvotes
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