{"raw_statement":[{"iden":"problem statement","content":"Takahashi wants to send a letter to Santa Claus. He has an envelope with an $X$\\-yen (Japanese currency) stamp stuck on it.  \nTo be delivered to Santa Claus, the envelope must have stamps in a total value of at least $Y$ yen.  \nTakahashi will put some more $10$\\-yen stamps so that the envelope will have stamps worth at least $Y$ yen in total.  \nAt least how many more $10$\\-yen stamps does Takahashi need to put on the envelope?"},{"iden":"constraints","content":"*   $X$ and $Y$ are integers.\n*   $1 \\le X,Y \\le 1000$"},{"iden":"input","content":"Input is given from Standard Input in the following format:\n\n$X$ $Y$"},{"iden":"sample input 1","content":"80 94"},{"iden":"sample output 1","content":"2\n\n*   After adding zero $10$\\-yen stamps to the $80$\\-yen stamp, the total is $80$ yen, which is less than the required amount of $94$ yen.\n*   After adding one $10$\\-yen stamp to the $80$\\-yen stamp, the total is $90$ yen, which is less than the required amount of $94$ yen.\n*   After adding two $10$\\-yen stamps to the $80$\\-yen stamp, the total is $100$ yen, which is not less than the required amount of $94$ yen."},{"iden":"sample input 2","content":"1000 63"},{"iden":"sample output 2","content":"0\n\nThe envelope may already have a stamp with enough value."},{"iden":"sample input 3","content":"270 750"},{"iden":"sample output 3","content":"48"}],"translated_statement":null,"sample_group":[],"show_order":["default"],"formal_statement":null,"simple_statement":null,"has_page_source":true}