Problem	minstack
User	Phoubia01
Submission Time	2025-12-23 20:25:07
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

minstack.cpp: In function ‘void push(int)’:
minstack.cpp:7:12: error: ‘a’ was not declared in this scope
7 | s.push(a);
| ^