Submission

Score: 50

User: Catpao

Problemset: เลขหลักของผลคูณ

Language: cpp

Time: 0.003 second

Submitted On: 2025-11-22 11:20:05

#include<bits/stdc++.h>
using namespace std;
int main()
{
	string a,b;
	int sum1 = 0,sum2 = 0;
	cin>>a>>b;
	for(int i=0;i<a.size();i++){
		int c = a[i] - '0';
		sum1 = sum1 + c * (pow(10,a.size()-i-1));
	}
	for(int i=0;i<b.size();i++){
		int c = b[i] - '0';
		sum2 = sum2 + c * (pow(10,b.size()-i-1));
	}
	sum1 = sum1 * sum2;
	string c = to_string(sum1);
	int x;
	cin>>x;
	if(x <= c.size()&&x > 0){
		cout<<c[c.size()-x];
	}
	else{
		cout<<"_";
	}
}