View Compilation Error

0_0_28882371_25599.cpp: In function 'void add(int, int)':
0_0_28882371_25599.cpp:16:14: error: 'n' was not declared in this scope
     while(x<=n){
              ^
0_0_28882371_25599.cpp: In function 'int main()':
0_0_28882371_25599.cpp:53:13: error: 'sum' was not declared in this scope
             sum[v.first] += 
             ^
0_0_28882371_25599.cpp:54:9: error: expected primary-expression before '}' token
         }
         ^