Problem
Given an arbitrary ransom note string and another string containing letters from all the magazines, write a function that will return true if the ransom note can be constructed from the magazines ; otherwise, it will return false.
Each letter in the magazine string can only be used once in your ransom note.
Note:
You may assume that both strings contain only lowercase letters.
Example
canConstruct("a", "b") -> false
canConstruct("aa", "ab") -> false
canConstruct("aa", "aab") -> true
Code
static int var = [](){
std::ios::sync_with_stdio(false);
cin.tie(NULL);
return 0;
}();
class Solution {
public:
bool canConstruct(string ransomNote, string magazine) {
long table[256] = {0};
for(int i=0;i<magazine.size();i++){
table[magazine[i]]++;
}
for(int i=0;i<ransomNote.size();i++){
if((--table[ransomNote[i]])<0)
return false;
}
return true;
}
};
Result
383. Ransom Note.png
