View Compilation Error

0_0_31123224_31147.cpp: In function 'int main(int, char**)':
0_0_31123224_31147.cpp:43:28: error: 'b' was not declared in this scope
   scanf("%I64u%I64u%I64u",&b,&p,&M);
                            ^
0_0_31123224_31147.cpp:43:31: error: 'p' was not declared in this scope
   scanf("%I64u%I64u%I64u",&b,&p,&M);
                               ^
0_0_31123224_31147.cpp:43:34: error: 'M' was not declared in this scope
   scanf("%I64u%I64u%I64u",&b,&p,&M);
                                  ^