很简单，只需要枚举

#include <iostream>
using namespace std;

int main()
{
int a,b,c;
cin >> a >> b >> c;
if(a < b && a < c)
{
cout << a;
}
if(b < a && b < c)
{
cout << b;
}
if(c < b && c < a)
{
cout << c;
}
return 0;
}