We analyze solar events associated with flares: gradual - M3.7 on March 7, 2011 and impulsive - X6.9 on August 9, 2011. These flares were accompanied by HXR and MW radiation, sustained > 100 MeV gamma radiation, CME with a velocity of ~ 2000 km /s. Estimates of the magnitude and duration of acceleration for CME were obtained from the condition of stitching the assumed uniformly accelerated and observed uniform motion. These estimates indicate that the CME should have accelerated significantly longer than the estimated minimum time. The obtained mean values and duration of CME acceleration do not contradict CME acceleration in two phases - impulsive and prolong, as was directly observed in the events of May 13, 2013 [Gou et al. 2020] and September 10, 2017 [Gopalswamy et al., 2018]. In the cases considered the largest bursts of HXR and MW radiation can be observed both before and during the CME impulsive acceleration (X6.9 flare on August 9, 2011), and after it (M3.7 flare on March 7, 2011). ). This shows that the acceleration processes of charged particles in flares do not depend on the magnitude of the CME acceleration. The CME velocity is high in the corona and interplanetary space, most likely, was determined by a long acceleration on March 7, 2011, but a long deceleration on August 9, 2011.