<Codesignal> deleteDigit

Medium

Given some integer, find the maximal number you can obtain by deleting exactly one digit of the given number.

Example

• For n = 152, the output should be
  deleteDigit(n) = 52;
• For n = 1001, the output should be
  deleteDigit(n) = 101.

Input/Output

• [execution time limit] 0.5 seconds (c)

• [input] integer n

  Guaranteed constraints:
  10 ≤ n ≤ 10^6.

• [output] integer

[C] Syntax Tips

// Prints help message to the console
// Returns a string
char * helloWorld(char * name) {
    char * answer = malloc(strlen(name) + 8);
    printf("This prints to the console when you Run Tests");
    strcpy(answer, "Hello, ");
    strcat(answer, name);
    return answer;
}

---

Solution

int deleteDigit(int n)
{
	int max=0;
	char *str=(char *)calloc(8,sizeof(char));

	sprintf(str,"%d",n);

	for(int i=0;i<strlen(str);i++)
	{
		int N=0;

		for(int j=0;j<strlen(str);j++)
		{
			if(i==j)
				continue;
			N*=10;
			N+=str[j]-'0';
		}

		max=N>max?N:max;
	}

	free(str);
	return max;
}