If you are new to learning programming and do not know where to start, please try Problem A “Welcome to AtCoder” from practice contest. There you can find a sample code for each language.
Also, if you are not familiar to problems in programming contests, we recommend you to try some problems in “AtCoder Beginners Selection” (https://atcoder.jp/contests/abs).
「競プロ典型 90 問」(Typical 90 Problems of Competitive Programming) (https://atcoder.jp/contests/typical90) is a collection of typical 90 competitive programming problems; unfortunately, currently the problem statements are all Japanese.
「C++入門 AtCoder Programming Guide for beginners (APG4b)」(https://atcoder.jp/contests/APG4b) is a C++ tutorial for competitive programmers. Sadly, this is only in Japanese too.

Just as instructed in the Problem Statement, receive string \(S\) and output the last character of \(S\). Check how to treat strings in your language.

Sample code (C++)

#include <iostream>
#include <string>
using namespace std;

int main(){
    string S;
    cin >> S >> S;
    cout << S.back() << endl;
}

Sample code (Python)

input()
print(input()[-1])