Codeforces Round #260 (Div. 2) B. Fedya and Maths
1 second
256 megabytes
standard input
standard output
Fedya studies in a gymnasium. Fedya's maths hometask is to calculate the following expression:
(1n + 2n + 3n + 4n) mod 5
for given value of n. Fedya managed to complete the task. Can you? Note that given number n can be extremely large (e.g. it can exceed any integer type of your programming language).
The single line contains a single integer n (0 ≤ n ≤ 10105). The number doesn't contain any leading zeroes.
Print the value of the expression without leading zeros.
4
4
124356983594583453458888889
0
Operation x mod y means taking remainder after division x by y.
Note to the first sample:
#include <cstdio>
#include <cstring>
using namespace std;
char str[+];//注意拿数组进行储存
int main()
{
scanf("%s",str);
int len = strlen(str);
int sum = (str[len-]-'')*+str[len-]-'';
if(sum%==)puts("");//做题前先打表
else puts("");
return ;
}
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