View Compilation Error

0_0_21605488_20540.cpp: In function 'int main()':
0_0_21605488_20540.cpp:42:44: error: expected ')' before ';' token
                 for(ll k=1; k<c; c-=k,k<<=1; ){
                                            ^
0_0_21605488_20540.cpp:42:46: error: expected primary-expression before ')' token
                 for(ll k=1; k<c; c-=k,k<<=1; ){
                                              ^