Score : 100 points
We have a sandglass that runs for X seconds. The sand drops from the upper bulb at a rate of 1 gram per second. That is, the upper bulb initially contains X grams of sand.
How many grams of sand will the upper bulb contains after t seconds?
The input is given from Standard Input in the following format:
X t
Print the number of sand in the upper bulb after t second.
100 17
83
17 out of the initial 100 grams of sand will be consumed, resulting in 83 grams.
48 58
0
All 48 grams of sand will be gone, resulting in 0 grams.
1000000000 1000000000
0