Codeforces Beta Round #92 (Div. 2 Only) A题
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这道题目我不想多说什么,自己动动笔就知道了!
#include <iostream>
#include <cstdio>
#include <cstring>
using namespace std;
int main()
{
int n,a,b;
cin>>n>>a>>b;
if(a+b<n)
cout<<b+1<<endl;
else if(a+b==n)
cout<<b<<endl;
else if(a+b>n)
{
cout<<n-a<<endl;
}
return 0;
}
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