Buying Sweets

AtCoder

IDabc087_a

Time2000ms

Memory256MB

Difficulty—

You went shopping to buy cakes and donuts with $X$ yen (the currency of Japan). First, you bought one cake for $A$ yen at a cake shop. Then, you bought as many donuts as possible for $B$ yen each, at a donut shop. How much do you have left after shopping? ## Constraints * $1 \leq A, B \leq 1$ $000$ * $A + B \leq X \leq 10$ $000$ * $X$, $A$ and $B$ are integers. ## Input Input is given from Standard Input in the following format: $X$ $A$ $B$ [samples]

Samples

Input #1

1234
150
100

Output #1

84

You have $1234 - 150 = 1084$ yen left after buying a cake. With this amount, you can buy $10$ donuts, after which you have $84$ yen left.

Input #2

1000
108
108

Output #2

Input #3

579
123
456

Output #3

Input #4

7477
549
593

Output #4

API Response (JSON)

{
  "problem": {
    "name": "Buying Sweets",
    "description": {
      "content": "You went shopping to buy cakes and donuts with $X$ yen (the currency of Japan). First, you bought one cake for $A$ yen at a cake shop. Then, you bought as many donuts as possible for $B$ yen each, at ",
      "description_type": "Markdown"
    },
    "platform": "AtCoder",
    "limit": {
      "time_limit": 2000,
      "memory_limit": 262144
    },
    "difficulty": "None",
    "is_remote": true,
    "is_sync": true,
    "sync_url": null,
    "sign": "abc087_a"
  },
  "statements": [
    {
      "statement_type": "Markdown",
      "content": "You went shopping to buy cakes and donuts with $X$ yen (the currency of Japan).\nFirst, you bought one cake for $A$ yen at a cake shop. Then, you bought as many donuts as possible for $B$ yen each, at ...",
      "is_translate": false,
      "language": "English"
    }
  ]
}

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