~cpp
import unittest
import math
def summation(num):
return num*(num+1)/2
def eq_2(a,b,c):
_2a = 2*a
_b_4ac = math.sqrt(b*b-4*a*c)
hae1 = (-b + _b_4ac) / _2a
hae2 = (-b - _b_4ac) / _2a
return hae1, hae2
def minint(num):
hae1, hae2 = eq_2(1.0, 1.0, (float)(-2*num))
hae = (int)(max(hae1, hae2))
sum = summation(hae)
if( sum < num ):
return hae+1, summation(hae+1)
else:
return hae, sum
class TestMinInt(unittest.TestCase):
def testSummation(self):
self.assertEquals(55, summation(10))
self.assertEquals(10, summation(4))
self.assertEquals(5050, summation(100))
self.assertEquals(500500, summation(1000))
if __name__=='__main__':
#unittest.main(argv=('','-v'))
print minint(3000)
