{"problem":{"name":"K-City","description":{"content":"In _K-city_, there are $n$ streets running east-west, and $m$ streets running north-south. Each street running east-west and each street running north-south cross each other. We will call the smallest","description_type":"Markdown"},"platform":"AtCoder","limit":{"time_limit":2000,"memory_limit":262144},"difficulty":"None","is_remote":true,"is_sync":true,"sync_url":null,"sign":"abc069_a"},"statements":[{"statement_type":"Markdown","content":"In _K-city_, there are $n$ streets running east-west, and $m$ streets running north-south. Each street running east-west and each street running north-south cross each other. We will call the smallest area that is surrounded by four streets a block. How many blocks there are in K-city?\n\n## Constraints\n\n*   $2 ≤ n, m ≤ 100$\n\n## Input\n\nInput is given from Standard Input in the following format:\n\n$n$ $m$\n\n[samples]","is_translate":false,"language":"English"}],"meta":{"iden":"abc069_a","tags":[],"sample_group":[["3 4","6\n\nThere are six blocks, as shown below:\n\n![image](https://atcoder.jp/img/abc069/9179be829dc9810539213537d4c7398c.png)"],["2 2","1\n\nThere are one block, as shown below:\n\n![image](https://atcoder.jp/img/abc069/997bfafa99be630b54d037225a5c68ea.png)"]],"created_at":"2026-03-03 11:01:14"}}