[pre-commit.ci] auto fixes from pre-commit.com hooks

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Author: pre-commit-ci[bot]

maths/tribonacci.py

@@ -1,21 +1,22 @@
 """
-This program calculates the "Nth Tribonacci number in a series. 
+This program calculates the "Nth Tribonacci number in a series.
 
-The Tribonacci sequence Tn is defined as follows :- 
+The Tribonacci sequence Tn is defined as follows :-
 
-T(0) = 0; T(1) = 1; T(2) = 1; and T(n+3) = T(n) + T(n+1) + T(n+3) for n>=0 
+T(0) = 0; T(1) = 1; T(2) = 1; and T(n+3) = T(n) + T(n+1) + T(n+3) for n>=0
 
-In this program, we assume an integer 'n' is given and we have to calculate nth Tribinacci number 
+In this program, we assume an integer 'n' is given and we have to calculate nth Tribinacci number
 
 """
 
-def tribonacci(self, n : int) -> int :
-    trib = [0,1,1]
-    for i in range(3,n+1):
-        x = trib[i-1] + trib[i-2] + trib[i-3]
+
+def tribonacci(self, n: int) -> int:
+    trib = [0, 1, 1]
+    for i in range(3, n + 1):
+        x = trib[i - 1] + trib[i - 2] + trib[i - 3]
         trib.append(x)
     return trib[n]
 
 
-if __name__ == "__main__" :
-    print(tribonacci(25)) #prints 1389537
+if __name__ == "__main__":
+    print(tribonacci(25))  # prints 1389537