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Add an example for AGC020-C
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examples/agc020-c.rs

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// https://atcoder.jp/contests/agc020/tasks/agc020_c
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//
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// 以下のクレートを使用。
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// - `bitset-fixed`
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// - `proconio`
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use bitset_fixed::BitSet;
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use proconio::input;
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fn main() {
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// `proconio::input!`。
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//
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// https://docs.rs/proconio/0.3.6/proconio/macro.input.html
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input! {
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r#as: [usize],
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}
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// `bitset-fixed`のREADMEにある解法。
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let sum = r#as.iter().sum::<usize>();
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// サイズ`sum + 1`のbit setに`fixed_bitset::BitSet`を使う。
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// これは`fixedbitset::FixedBitSet`と違いビットシフトが可能。
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// (`bitvec`クレートだと可能。提案しておけばよかったか..)
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//
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// https://docs.rs/bitset-fixed/0.1/bitset_fixed/struct.BitSet.html
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let mut dp = BitSet::new(sum + 1);
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dp.set(0, true);
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for a in r#as {
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dp |= &(&dp << a);
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}
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let ans = ((sum + 1) / 2..).find(|&i| dp[i]).unwrap();
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println!("{}", ans);
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}

test-examples.toml

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matching = "Words"
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meta = { using = ["itertools", "proconio"] }
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[examples.agc020-c]
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type = "Normal"
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name = "AGC020: C - Median Sum"
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url = "https://atcoder.jp/contests/agc020/tasks/agc020_c"
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matching = "Words"
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meta = { using = ["bitset-fixed", "proconio"] }
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[examples.agc023-a]
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type = "Normal"
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name = "AGC023: A - Zero-Sum Ranges"

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