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 with 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.

In this problem, you are asked to convert a character code to a character. Please check how to treat strings and characters in your programming language.

In C language, the value is outputted as a character by specifying an appropriate format specifier.

#include<stdio.h>
int main(){
	int n;
	scanf("%d",&n);
	printf("%c\n",n);
}

You may do so in C++ too, if you use printf. In case of using iostream(cout), you should explicitly cast it to a char type in order to output it as a character.

#include<bits/stdc++.h>
using namespace std;
int main(){
	int N;
	cin >> N;
	cout << (char)N << endl;
}

In Python, there is a function chr that converts a character code to a character.

N=int(input())
print(chr(N))