{"problem":{"name":"Base K","description":{"content":"You are given integers $A$ and $B$, in base $K$.   Print $A \\times B$ in decimal.","description_type":"Markdown"},"platform":"AtCoder","limit":{"time_limit":2000,"memory_limit":262144},"difficulty":"None","is_remote":true,"is_sync":true,"sync_url":null,"sign":"abc220_b"},"statements":[{"statement_type":"Markdown","content":"You are given integers $A$ and $B$, in base $K$.  \nPrint $A \\times B$ in decimal.\n\n## Constraints\n\n*   $2 \\leq K \\leq 10$\n*   $1 \\leq A,B \\leq 10^5$\n*   $A$ and $B$ are in base-$K$ representation.\n\n## Input\n\nInput is given from Standard Input in the following format:\n\n$K$\n$A$ $B$\n\n[samples]\n\n## Notes\n\nFor base-$K$ representation, see [Wikipedia's article on Positional notation](https://en.wikipedia.org/wiki/Positional_notation).","is_translate":false,"language":"English"}],"meta":{"iden":"abc220_b","tags":[],"sample_group":[["2\n1011 10100","220\n\n`1011` in base $2$ corresponds to $11$ in base $10$.  \n`10100` in base $2$ corresponds to $20$ in base $10$.  \nWe have $11 \\times 20 = 220$, so print $220$."],["7\n123 456","15642\n\n`123` in base $7$ corresponds to $66$ in base $10$.  \n`456` in base $7$ corresponds to $237$ in base $10$.  \nWe have $66 \\times 237 = 15642$, so print $15642$."]],"created_at":"2026-03-03 11:01:14"}}