View Compilation Error

0_0_17600476_6249.cpp: In function 'int main()':
0_0_17600476_6249.cpp:106:41: error: 'lltoa' was not declared in this scope
                         lltoa(a[i],aa,10);
                                         ^
0_0_17600476_6249.cpp:130:41: error: 'lltoa' was not declared in this scope
                         lltoa(a[i],aa,10);
                                         ^