题目链接：https://abc082.contest.atcoder.jp/tasks/abc082_a
Time limit : 2sec / Memory limit : 256MB
Score : 100 points
Problem Statement
You are given two positive integers a and b. Let x be the average of a and b. Print x rounded up to the nearest integer.
Constraints
- a and b are integers.
- 1≤a,b≤100
Input
Input is given from Standard Input in the following format:
a b
Output
Print x rounded up to the nearest integer.
Sample Input 1
Copy
1 3
Sample Output 1
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2
The average of 1 and 3 is 2.0, and it will be rounded up to the nearest integer, 2.
Sample Input 2
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7 4
Sample Output 2
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6
The average of 7 and 4 is 5.5, and it will be rounded up to the nearest integer, 6.
Sample Input 3
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5 5
Sample Output 3
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5
1 #include <iostream> 2 #include <cstdio> 3 #include <algorithm> 4 #include <stack> 5 #include <string> 6 #include <cstring> 7 #include <cmath> 8 #include <cstdio> 9 using namespace std; 10 int main() 11 { 12 int a,b; 13 while(cin>>a>>b){ 14 if((a+b)%2==0) cout<<(a+b)/2<<endl; 15 else{ 16 int c=(a+b)/2; 17 if(a+b-2*c<=1) cout<<c+1<<endl; 18 else cout<<c<<endl; 19 } 20 } 21 return 0; 22 }