Change i3 shortcuts for window closing, screen locking

.config/i3/config

@@ -34,7 +34,7 @@ floating_modifier $mod
 bindsym $mod+Return exec i3-sensible-terminal
 
 # kill focused window
-bindsym $mod+Shift+q kill
+bindsym $mod+Shift+c kill
 
 # start dmenu (a program launcher)
 #bindsym $mod+space exec dmenu_run
@@ -132,14 +132,12 @@ bindsym $mod+Shift+9 move container to workspace $ws9
 bindsym $mod+Shift+0 move container to workspace $ws10
 
 # reload the configuration file
-bindsym $mod+Shift+c reload
+bindsym $mod+Shift+y reload
 # restart i3 inplace (preserves your layout/session, can be used to upgrade i3)
 bindsym $mod+Shift+r restart
 # exit i3 (logs you out of your X session)
 bindsym $mod+Shift+e exec "i3-nagbar -t warning -m 'You pressed the exit shortcut. Do you really want to exit i3? This will end your X session.' -B 'Yes, exit i3' 'i3-msg exit'"
 
-bindsym $mod+Shift+z exec "i3-nagbar -m 'I am not useful?' -B 'Agreed!' 'i3-msg exit'"
-
 # resize window (you can also use the mouse for that)
 mode "resize" {
         # These bindings trigger as soon as you enter the resize mode
@@ -173,4 +171,4 @@ bar {
         status_command i3status
 }
 
-bindsym $mod+shift+x exec i3lock
+bindsym $mod+Ctrl+l exec i3lock