Codeforces Beta Round 55 (Div. 2) - 59 A. Word solution

 

Codeforces Beta Round 55 (Div. 2) - 59 A. Word solution

#include <stdio.h>
#include <string.h>
#include <ctype.h>
 
int main() {
  #ifndef ONLINE_JUDGE
  freopen("input.txt", "r", stdin);
  freopen("output.txt", "w", stdout);
  #endif
  char s[101];
  scanf("%s", s);
  int upL=0, lowL=0;
  for(int i=0; i<strlen(s); i++) {
    //check how many uppercase letters
    if(isupper(s[i])!=0) upL++;
    //isupper() function of ctype.h checks whether the char ->
    //-> is a upper (or capital) letter, returns true ->
    //-> if it is upper letter. returns 0 if not
  } //check how many uppercase letters, for loop ends here
  for(int i=0; i<strlen(s); i++) {
    //check how many lower letters
    if(islower(s[i])!=0) lowL++;
  } //lower letter check loop ends here
  if(lowL<upL) { //checking if lower letter is less than upper letter
    for(int i=0; i<strlen(s); i++) {
      //if so then we need to convert all chars in string to uppercase
      s[i]=toupper(s[i]);
      //that is achieved by toupper() of ctype.h
      //basically we pass through all chars in a string
      //and convert them to upper letter
    }
  }
  else { //if lower letters are equal to or more than upper letters
    for(int i=0; i<strlen(s); i++) {
      s[i]=tolower(s[i]);
      //similar to toupper(). tolower() function of ctype.h helps us
      //to lowerletter all chars of a string
    }
  }
  printf("%s\n", s);
  //printf("up letter is %d\n", upL);
  //printf("low letter is %d\n", lowL);
  return 0;
}

all necessary information is provided in the code. thanks