every year race take place motorway city a B this year Vanya decide race drive car bear noble the HuffpufferSo Vasya leave city a Huffpuffer beginning fill petrol tank α liter petrol α10 Vanyas favorite number necessarily integer petrol station locate motorway interval 100 kilometer ie station locate 100 kilometer away city a second 200 kilometer away city a 300 kilometer away city A the huffpuffer spend 10 liter petrol 100 kilometer Vanya check petrol tank time pass petrol station if petrol leave tank station Vanya fill tank α liter petrol otherwise do not stop station drive for example α4321 car fuel time station number 4 there ll 321 petrol liter leave after fuel car 4642 liter then Vanya stop station number 8 end 64243214963 liter the stop station number 12 96343215284 the stop station number 17 you will not believe huffpuffer lead race perhaps unexpected snow perhaps video camera instal motorway register speed limit breaking perhaps fact Vanya threaten junk huffpuffer car win whatever reason huffpuffer lead jealous people contestant wrack brain trying think way stop outrageone way petrol station Vanya stop your task calculate station happen warn Vanya you do not know α number give succession number station Vanya stop Find number station stop