Submission

Score: 100

User: Habibi

Problemset: เลขหลักของผลคูณ

Language: cpp

Time: 0.002 second

Submitted On: 2025-10-12 11:04:39

#include<stdio.h>
int main(){
	int x;
	int a,b;
	scanf("%d %d %d",&a,&b,&x);
	long long m;
	m=a*b;
	int arr[20];
//	printf("%d %d\n",m,arr[50]);

	int i=0;
	while(m!=0){
		arr[i]=m%10;
		m=m/10;
//		printf("%d\n",arr[i]);
		i++;
	}
//	printf("%d\n",arr[i+1]);
	int cnt=i;

	int ans[cnt];
	int j=0;
	for(int i=cnt-1;i>-1;i--){
		ans[j]=arr[i];
//		printf("%d\n",ans[j]);
		j++;	
	}
	if(x>0&&x<=cnt){
		printf("%d",ans[x-1]);
	}
	else{
		printf("_");
	}
	
}