1006. Stone, 1006 stone

1006. Stone, 1006 stone
1006. Rock (Standard IO) Time Limit: 1000 MS space limit: 262144 KB Specific Limit

The honest farmer found three small stones yesterday. He wanted to pick up another small stone and let the four stones weigh 20 kilograms in total, how many pounds of stones should he pick up? Enter three integers, a, B, and c, which are the weights of these three stones) Output a number, indicating how many pounds of stones the farmer should pick up. Sample Input

3 5 7

Sample output

5

Data range restrictions

1 # include <iostream> 2 # include <cstdio> 3 # include <cmath> 4 using namespace std; 5 int r, x, p; 6 int main () 7 {8 cin> r> x> p; 9 printf ("% d", 20-r-x-p); 10 return 0; 11}