GeeksForGeeks interview guide: Adding pythagorean triplet problem and roman to integer conversion #58 (#99)

* Adding pythagorean triplet problem

* Adding roman to integer conversion problem

Author: hitblunders

GeeksforGeeks/pythagorean_triplet.py

@@ -0,0 +1,51 @@
+'''Given an array arr of N integers
+write a function that 
+returns true if there is a triplet (a, b, c) 
+that satisfies a2 + b2 = c2
+otherwise false'''
+
+import math
+
+def checkTriplet(arr, n):
+    mxm = 0
+
+    # finding maximum element
+    for element in arr:
+        mxm = max(mxm, element)
+    
+    # hashing array
+    hash = [0]*(mxm+1)
+
+    for element in arr:
+        hash[element] += 1
+
+    for i in range(1, mxm+1):
+        if hash[i] == 0:
+            continue
+
+        for j in range(1, mxm+1):
+            if (i==j and hash[i]==1) or hash[j]==0:
+                continue
+
+            val = int(math.sqrt(i*i+j*j))
+            if val*val != (i*i+j*j):
+                continue
+            if val>mxm:
+                continue
+            if hash[val]:
+                return True
+    return False
+
+'''n = int(input())
+a = list(map(int,input().split()))'''
+
+N = 5
+Arr = [3, 2, 4, 6, 5]
+
+# N = 3
+# Arr = [3, 8, 5]
+
+if checkTriplet(Arr, N):
+    print("Yes")
+else:
+    print("No")

GeeksforGeeks/roman_to_integer.py

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+'''
+Input:
+The first line of each test case contains the no of test cases T
+Then T test cases follow. Each test case contains a string s denoting the roman no
+
+Output:
+For each test case in a new line print the integer representation of roman number s
+'''
+
+def roman_to_int(roman):
+    value = {
+        'I': 1,
+        'V': 5,
+        'X': 10,
+        'L': 50,
+        'C': 100,
+        'D': 500,
+        'M': 1000
+    }
+
+    prev = 0
+    ans = 0
+    n = len(roman)
+    for i in range(n-1, -1, -1):
+        if value[roman[i]] >= prev:
+            ans += value[roman[i]]
+        else:
+            ans -= value[roman[i]]
+
+        prev = value[roman[i]]
+
+    print(ans)
+'''for _ in range(int(input())):
+    s = input()
+    roman_to_int(s)
+'''
+# s = 'V'
+# s = 'III'
+s = 'XIV'
+
+roman_to_int(s)