結果
問題 | No.1861 Required Number |
ユーザー |
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提出日時 | 2022-03-04 21:41:27 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 142 ms / 2,500 ms |
コード長 | 2,448 bytes |
コンパイル時間 | 2,419 ms |
コンパイル使用メモリ | 206,340 KB |
最終ジャッジ日時 | 2025-01-28 04:59:28 |
ジャッジサーバーID (参考情報) |
judge3 / judge5 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 42 RE * 4 |
ソースコード
#include <bits/stdc++.h>using namespace std;#include <atcoder/modint>using namespace atcoder;//using mint = modint998244353;using mint = modint1000000007;using ll = long long;using ld = long double;using pll = pair<ll, ll>;using tlll = tuple<ll, ll, ll>;constexpr ll INF = 1LL << 60;template<class T> bool chmin(T& a, T b) {if (a > b) {a = b; return true;} return false;}template<class T> bool chmax(T& a, T b) {if (a < b) {a = b; return true;} return false;}ll safemod(ll A, ll M) {return (A % M + M) % M;}ll divfloor(ll A, ll B) {if (B < 0) {return divfloor(-A, -B);} return (A - safemod(A, B)) / B;}ll divceil(ll A, ll B) {if (B < 0) {return divceil(-A, -B);} return divfloor(A + B - 1, B);}template<class T> void unique(vector<T> &V) {V.erase(unique(V.begin(), V.end()), V.end());}template<class T> void sortunique(vector<T> &V) {sort(V.begin(), V.end()); V.erase(unique(V.begin(), V.end()), V.end());}#define FINALANS(A) do {cout << (A) << '\n'; exit(0);} while (false)template<class T> void printvec(vector<T> &V) {int _n = V.size(); for (int i = 0; i < _n; i++) cout << V[i] << (i == _n - 1 ? "" : " ");cout << '\n';}template<class T> void printvect(vector<T> &V) {for (auto v : V) cout << v << '\n';}template<class T> void printvec2(vector<vector<T>> &V) {for (auto &v : V) printvec(v);}int main(){ll N, K;cin >> N >> K;assert(N <= 10000 && K <= 1000);vector<ll> A(N);for (ll i = 0; i < N; i++){cin >> A.at(i);}vector dp1(N + 1, vector(K + 1, false));vector dp2(N + 1, vector(K + 1, false));dp1.at(0).at(0) = true;dp2.at(N).at(0) = true;for (ll i = 0; i < N; i++){for (ll j = 0; j <= K; j++){if (!dp1.at(i).at(j))continue;ll nj = j + A.at(i);if (nj <= K)dp1.at(i + 1).at(nj) = true;dp1.at(i + 1).at(j) = true;}}for (ll i = N - 1; i >= 0; i--){for (ll j = 0; j <= K; j++){if (!dp2.at(i + 1).at(j))continue;ll nj = j + A.at(i);if (nj <= K)dp2.at(i).at(nj) = true;dp2.at(i).at(j) = true;}}if (!dp1.at(N).at(K))FINALANS(-1);vector<bool> need(N, true);for (ll i = 0; i < N; i++){for (ll j = 0; j <= K; j++){ll j2 = K - j;if (dp1.at(i).at(j) && dp2.at(i + 1).at(j2))need.at(i) = false;}}ll ans = count(need.begin(), need.end(), true);cout << ans << endl;//printvec(need);}