View Compilation Error

0_0_37863419_12211.cpp: In function 'void dfs(int, int, int)':
0_0_37863419_12211.cpp:49:34: error: expected ')' before ':' token
     dfs(i + 1, lcm(x, Q[i])?n:n+1:lcm(x, Q[i]), rong + 1);
                                  ^