bQVaOn - Online C Compiler & Debugging Tool

#include <stdio.h>
#include <ctype.h>

int main(void) {
	int n;
	scanf("%d",&n);
	char a[100000];
	scanf("%s",a);
	int m[26]={0};
	for(int i=0;i<n;i++){
		if(isalpha(a[i])){
			if(isupper(a[i])) a[i]=tolower(a[i]);
			printf("%c",a[i]);
			m[a[i]-'a']++;
		}
	}
	printf("\n");
	for(int i=0;i<25;i++){
		printf("%d ",m[i]);
	}
	printf("%d\n",m[25]);
	return 0;
}