View Compilation Error

0_0_16020220_20990.cpp:18:17: error: stray '\' in program
                 if(floor((nowsum+mid)\nown*(n+1))<=y)left=mid+1;
                 ^
0_0_16020220_20990.cpp:25:13: error: stray '\' in program
             nowsum=nowsum\nown*(nown+1);
             ^
0_0_16020220_20990.cpp: In function 'int main()':
0_0_16020220_20990.cpp:18:39: error: expected ')' before 'nown'
                 if(floor((nowsum+mid)\nown*(n+1))<=y)left=mid+1;
                                       ^
0_0_16020220_20990.cpp:25:27: error: expected ';' before 'nown'
             nowsum=nowsum\nown*(nown+1);
                           ^