View Compilation Error

0_0_36668482_13000.cpp:30:1: error: 'stack' does not name a type
 stack<int>s;
 ^
0_0_36668482_13000.cpp: In function 'int get_init(int)':
0_0_36668482_13000.cpp:38:9: error: 's' was not declared in this scope
         s.push(x % 10);
         ^
0_0_36668482_13000.cpp:42:12: error: 's' was not declared in this scope
     while(!s.empty()){
            ^