Petya and Strings

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一、Petya and Strings

总结

一、Petya and Strings

本题链接：

题目：

A. Petya and Strings

time limit per test2 seconds

memory limit per test256 megabytes

inputstandard input

outputstandard output

Little Petya loves presents. His mum bought him two strings of the same size for his birthday. The strings consist of uppercase and lowercase Latin letters. Now Petya wants to compare those two strings lexicographically. The letters’ case does not matter, that is an uppercase letter is considered equivalent to the corresponding lowercase letter. Help Petya perform the comparison.

Input

Each of the first two lines contains a bought string. The strings’ lengths range from 1 to 100 inclusive. It is guaranteed that the strings are of the same length and also consist of uppercase and lowercase Latin letters.

Output

If the first string is less than the second one, print “-1”. If the second string is less than the first one, print “1”. If the strings are equal, print “0”. Note that the letters’ case is not taken into consideration when the strings are compared.

Examples

input

aaaa

aaaA

output

0

input

abs

Abz

output

-1

input

abcdefg

AbCdEfF

output

1

Note

If you want more formal information about the lexicographical order (also known as the “dictionary order” or “alphabetical order”), you can visit the following site:

http://en.wikipedia.org/wiki/Lexicographical_order

本博客给出本题截图：

题意：依次比较两个字符串的每一位，如果不同就比较大小。

AC代码

#include <iostream>
#include <string>
using namespace std;
int main()
{
  string a, b;
  cin >> a >> b;
  int cnt1 = 0, cnt2 = 0;
  for (int i = 0; i < a.size(); i ++ )
  {
    if (a[i] >= 'A' && a[i] <= 'Z')
      a[i] = a[i] - 'A' + 'a';
    if (b[i] >= 'A' && b[i] <= 'Z')
      b[i] = b[i] - 'A' + 'a';
    if (a[i] > b[i])
    {
      cout << "1" << endl;
      exit(0);
    }
    if (a[i] == b[i]) continue;
    if (a[i] < b[i]) 
    {
      cout << "-1" << endl;
      exit(0);
    }
  }
  cout << "0" << endl;
  return 0;
}

总结

string 线

uppercase 大写字母

compare 比较

lexicographically 字典学上

corresponding 相应的

equivalent 相同的

range 范围

inclusive 包含的

guaranteed 保证

水题，不解释