# -*- coding: cp1251 -*-
from flask import Flask, request, url_for
app = Flask(__name__)
app.secret_key = 'dghjkll'
@app.route('/')
def hello_person():
    return """
        <form method="POST" action="%s"><center><input name="A" /><center>
        <p></p>
        <input name="B" /><center>
        <input type="submit" value="Add" /><center>
         </form>
        """ % (url_for('gcd'),)
@app.route('/',methods=['POST'])
def gcd(a,b):
    while a != b:
        if a > b:
            a = a - b
        else:
            b = b - a
        return  a
    a=int(request.form["A"])
    b=int(request.form["B"])
    'NOD equals %s'%(gcd(a,b))
if __name__ == '__main__':
    app.debug = True
    app.run()