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Given an input string s = "abcde", which of the following code snippets correctly stores the characters of the string into a stack st?
(I) 
stack<char> st;
for (int i = 0; i < s.length(); i++) {
    st.push(s[i]);
}
(II) 
stack<char> st;
for (int i = s.length() - 1; i >= 0; i--) {
    st.push(s[i]);
}
(III) 
stack<char> st;
for (int i = 0; i < s.length(); i++) {
    st.push_back(s[i]);
}
  • a)
    I only
  • b)
    II only
  • c)
    I and II only
  • d)
    II and III only
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Given an input string s = "abcde", which of the following co...
The code snippet II correctly stores the characters of the input string into a stack by iterating over the string in reverse order.
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Given an input string s = "abcde", which of the following code snippets correctly stores the characters of the string into a stack st?(I)stack<char> st;for (int i = 0; i < s.length(); i++) { st.push(s[i]);}(II)stack<char> st;for (int i = s.length() - 1; i >= 0; i--) { st.push(s[i]);}(III)stack<char> st;for (int i = 0; i < s.length(); i++) { st.push_back(s[i]);}a)I onlyb)II onlyc)I and II onlyd)II and III onlyCorrect answer is option 'B'. Can you explain this answer?
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