結果
| 問題 | No.2542 Yokan for Two | 
| コンテスト | |
| ユーザー |  Forested | 
| 提出日時 | 2023-11-24 21:29:26 | 
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) | 
| 結果 | 
                                AC
                                 
                             | 
| 実行時間 | 4 ms / 2,000 ms | 
| コード長 | 2,525 bytes | 
| コンパイル時間 | 928 ms | 
| コンパイル使用メモリ | 126,892 KB | 
| 最終ジャッジ日時 | 2025-02-17 23:45:39 | 
| ジャッジサーバーID (参考情報) | judge1 / judge1 | 
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| ファイルパターン | 結果 | 
|---|---|
| sample | AC * 4 | 
| other | AC * 40 | 
ソースコード
#ifndef LOCAL
#define FAST_IO
#endif
// ============
#include <algorithm>
#include <array>
#include <bitset>
#include <cassert>
#include <cmath>
#include <cstring>
#include <iomanip>
#include <iostream>
#include <list>
#include <map>
#include <numeric>
#include <queue>
#include <random>
#include <set>
#include <stack>
#include <string>
#include <tuple>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>
#define OVERRIDE(a, b, c, d, ...) d
#define REP2(i, n) for (i32 i = 0; i < (i32)(n); ++i)
#define REP3(i, m, n) for (i32 i = (i32)(m); i < (i32)(n); ++i)
#define REP(...) OVERRIDE(__VA_ARGS__, REP3, REP2)(__VA_ARGS__)
#define PER(i, n) for (i32 i = (i32)(n) - 1; i >= 0; --i)
#define ALL(x) begin(x), end(x)
using namespace std;
using u32 = unsigned int;
using u64 = unsigned long long;
using i32 = signed int;
using i64 = signed long long;
using f64 = double;
using f80 = long double;
template <typename T>
using Vec = vector<T>;
template <typename T>
bool chmin(T &x, const T &y) {
    if (x > y) {
        x = y;
        return true;
    }
    return false;
}
template <typename T>
bool chmax(T &x, const T &y) {
    if (x < y) {
        x = y;
        return true;
    }
    return false;
}
#ifdef INT128
using u128 = __uint128_t;
using i128 = __int128_t;
istream &operator>>(istream &is, i128 &x) {
    i64 v;
    is >> v;
    x = v;
    return is;
}
ostream &operator<<(ostream &os, i128 x) {
    os << (i64)x;
    return os;
}
istream &operator>>(istream &is, u128 &x) {
    u64 v;
    is >> v;
    x = v;
    return is;
}
ostream &operator<<(ostream &os, u128 x) {
    os << (u64)x;
    return os;
}
#endif
[[maybe_unused]] constexpr i32 INF = 1000000100;
[[maybe_unused]] constexpr i64 INF64 = 3000000000000000100;
struct SetUpIO {
    SetUpIO() {
#ifdef FAST_IO
        ios::sync_with_stdio(false);
        cin.tie(nullptr);
#endif
        cout << fixed << setprecision(15);
    }
} set_up_io;
// ============
#ifdef DEBUGF
#else
#define DBG(x) (void) 0
#endif
int main() {
    i32 l, n;
    cin >> l >> n;
    Vec<i32> x(n);
    REP(i, n) {
        cin >> x[i];
    }
    using BS = bitset<300010>;
    const i32 off = 100002;
    BS odd, even;
    odd[off] = true;
    REP(i, n) {
        BS nodd = odd | (even >> x[i]);
        BS neven = even | (odd << x[i]);
        odd = nodd;
        even = neven;
    }
    i32 ans = l;
    REP(i, 1, l) {
        if (even[off + i]) {
            chmin(ans, abs(l - 2 * i));
        }
    }
    cout << ans << '\n';
}
            
            
            
        