diff --git a/backtracking/m-coloring-problem.py b/backtracking/m-coloring-problem.py
new file mode 100644
index 000000000000..2c6350f20975
--- /dev/null
+++ b/backtracking/m-coloring-problem.py
@@ -0,0 +1,39 @@
+def isSafe(node, color, graph, n, col):
+ for k in range(n):
+ if graph[node][k] == 1 and col[k] == color:
+ return False
+ return True
+
+
+def solve(node, col, m, n, graph):
+ if node == n:
+ return True
+ for c in range(1, m + 1):
+ if isSafe(node, c, graph, n, col):
+ col[node] = c
+ if solve(node + 1, col, m, n, graph):
+ return True
+ col[node] = 0
+ return False
+
+
+def graphColoring(graph, m, n):
+ col = [0] * n
+ if solve(0, col, m, n, graph):
+ return True
+ return False
+
+
+if __name__ == "__main__":
+ V = int(input())
+ E = int(input())
+ graph = [[0 for _ in range(V)] for _ in range(V)]
+ for _ in range(E):
+ u, v = map(int, input().split())
+ graph[u][v] = 1
+ graph[v][u] = 1
+ m = int(input())
+ if graphColoring(graph, m, V):
+ print("True")
+ else:
+ print("False")
diff --git a/other/calc.py b/other/calc.py
new file mode 100644
index 000000000000..dcf466cb48f7
--- /dev/null
+++ b/other/calc.py
@@ -0,0 +1,89 @@
+from flask import Flask, request, render_template_string
+
+app = Flask(__name__)
+
+
+def calculate(num1: float, num2: float, operation: str) -> float:
+ """
+ Perform basic arithmetic operations: add, subtract, multiply, divide.
+
+ >>> calculate(2, 3, 'add')
+ 5
+ >>> calculate(5, 3, 'subtract')
+ 2
+ >>> calculate(4, 2, 'multiply')
+ 8
+ >>> calculate(10, 2, 'divide')
+ 5.0
+ >>> calculate(5, 0, 'divide')
+ Traceback (most recent call last):
+ ...
+ ValueError: Division by zero is not allowed.
+ """
+ if operation == "add":
+ return num1 + num2
+ elif operation == "subtract":
+ return num1 - num2
+ elif operation == "multiply":
+ return num1 * num2
+ elif operation == "divide":
+ if num2 == 0:
+ raise ValueError("Division by zero is not allowed.")
+ return num1 / num2
+ else:
+ raise ValueError(f"Unknown operation: {operation}")
+
+
+# HTML template for the web interface
+template = """
+
+
+
+ Flask Calculator
+
+
+
+ Flask Calculator
+
+ {% if result is not none %}
+ Result: {{ result }}
+ {% endif %}
+
+
+"""
+
+
+@app.route("/", methods=["GET", "POST"])
+def home():
+ result = None
+ if request.method == "POST":
+ try:
+ num1 = float(request.form["num1"])
+ num2 = float(request.form["num2"])
+ op = request.form["operation"]
+ result = calculate(num1, num2, op)
+ except Exception as e:
+ result = str(e)
+ return render_template_string(template, result=result)
+
+
+if __name__ == "__main__":
+ app.run(debug=True)