#include<bits/stdc++.h>
using namespace std;
string a;
int b , numa[5005] , lena , ans[5005];
long long x;
int main()
{
	cin >> a;
	cin >> b;
	lena = a.length();
	for (int i = 1 ; i <= lena ; i++)
		numa[i] = a[i - 1] - '0';
	for (int i = 1 ; i <= lena ; i++)
	{
		x = x * 10 + numa[i];
		ans[i] += x / b;
		x %= b;
	}
	int t = 0;
	while (ans[t] == 0 && t <= lena) t++;
	for (int i = t ; i <= lena ; i++)
	{
		cout << ans[i];
	}
	return 0; 
} //代码已AC

众所周知，python自带高精度，所以蒟蒻拿python来水一波

$AC$ $Code$：

a = int(input())
b = int(input())
print(a // b)

或

print(int(input()) // int(input()))

#include<bits/stdc++.h>
using namespace std;
int main()
{
	char a1[100];
	int a[100], c[100], lena, i, x = 0, lenc, b;
	memset(a,0,sizeof(a));
	memset(c,0,sizeof(c));
	gets(a1);
	cin >> b;
	lena = strlen(a1);
	for (i = 0; i <= lena - 1; i++)
	{
	    a[i + 1] = a1[i] - 48;
	}
	for (i = 1; i <= lena; i++)
	{
	    c[i] = (x * 10 + a[i]) / b;
	    x = (x * 10 + a[i]) % b;
	}
	lenc = 1;
	while (c[lenc] == 0 && lenc < lena)
	{
	    lenc++;
	}
	for (i = lenc; i <= lena; i++)
	{
	    cout << c[i];
	}
	return 0; 
}