View Compilation Error

0_0_24536902_20931.cpp: In function 'long long int calxor(long long int, long long int, long long int)':
0_0_24536902_20931.cpp:19:7: error: 'l' was not declared in this scope
 int t=l;ll tmp=a1+n*d;
       ^
0_0_24536902_20931.cpp: In function 'int main()':
0_0_24536902_20931.cpp:39:24: error: 'pow' was not declared in this scope
 int bound=pow(n,1.0/2.1);
                        ^