2022-09-03 15:41:36 +08:00
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1. use `int arr[][Columns]` for 2-d function declaration
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2. `#pragma gcc optimize("Ofast, inline")` to increase speed
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2022-06-14 23:33:35 +08:00
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3. use parens to close bitwise operations and %
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4. remember the scope in loops (int i) (int j)
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2022-09-03 15:41:36 +08:00
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5. `matrix[i][j]` in scanning a 2d array.
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6. figure out `matrix[i][j]` and `matrix[i][n-1]`
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2022-06-14 23:33:35 +08:00
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2022-09-03 15:41:36 +08:00
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More can be found in [[OJ-index]]
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