View Compilation Error

0_0_14884274_24139.cpp: In function 'int main()':
0_0_14884274_24139.cpp:80:38: error: 'a' was not declared in this scope
                     if((*i).first >= a && (*i).first <= b)
                                      ^
0_0_14884274_24139.cpp:80:57: error: 'b' was not declared in this scope
                     if((*i).first >= a && (*i).first <= b)
                                                         ^
0_0_14884274_24139.cpp:91:31: error: 'a' was not declared in this scope
                 scanf("%d%d",&a,&b);
                               ^
0_0_14884274_24139.cpp:91:34: error: 'b' was not declared in this scope
                 scanf("%d%d",&a,&b);
                                  ^