結果
問題 | No.332 数列をプレゼントに |
ユーザー |
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提出日時 | 2018-10-18 14:48:56 |
言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 89 ms / 2,000 ms |
コード長 | 3,158 bytes |
コンパイル時間 | 1,985 ms |
コンパイル使用メモリ | 184,928 KB |
実行使用メモリ | 29,624 KB |
最終ジャッジ日時 | 2024-11-06 08:35:30 |
合計ジャッジ時間 | 6,920 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 5 |
other | AC * 42 |
ソースコード
#include "bits/stdc++.h"using namespace std;typedef long long ll;typedef pair<int, int> pii;typedef pair<ll, ll> pll;const int INF = 1e9;const ll LINF = 1e18;inline ll gcd(ll a, ll b) { return b ? gcd(b, a%b) : a; }inline ll lcm(ll a, ll b) { return a / gcd(a, b)*b; }template<class S,class T> ostream& operator << (ostream& out,const pair<S,T>& o){ out << "(" << o.first << "," << o.second << ")"; return out; }template<class T> ostream& operator << (ostream& out,const vector<T> V){ for(int i = 0; i < V.size(); i++){ out << V[i]; if(i!=V.size()-1) out << " ";} return out; }template<class T> ostream& operator << (ostream& out,const vector<vector<T> > Mat){ for(int i = 0; i < Mat.size(); i++) { if(i != 0) out << endl; out<< Mat[i];} return out; }template<class S,class T> ostream& operator << (ostream& out,const map<S,T> mp){ out << "{ "; for(auto it = mp.begin(); it != mp.end(); it++){ out <<it->first << ":" << it->second; if(mp.size()-1 != distance(mp.begin(),it)) out << ", "; } out << " }"; return out; }/*<url:https://yukicoder.me/problems/no/332>問題文=============================================================================================================================解説=============================================================================================================================*/string solve(){string res;ll N,X; cin >> N >> X;vector<pll> A(N);for(int i = 0; i < N;i++){cin >> A[i].first; A[i].second = i;}sort(A.rbegin(),A.rend());int K = min(20,(int)A.size());vector<pll> C(A.begin(),A.begin()+K),D(A.begin()+K,A.end());ll Csz = C.size();vector<ll> Cdp(1<<Csz);for(int i = 0; i < (1<<Csz); i++){for(int j = 0; j < Csz;j++){if((i>>j)&1){Cdp[i] += C[j].first;}}}ll Dsz = D.size();ll Dsum = accumulate(D.begin(),D.end(),0LL,[](ll sum,const pll& p){return sum + p.first;});vector<vector<int>> Ddp(Dsz+1,vector<int>(Dsum+1));Ddp[0][0] = true;for(int i = 0; i < Dsz;i++){for(int j = 0; j <= Dsum;j++){if(Ddp[i][j]){Ddp[i+1][j] |= Ddp[i][j];Ddp[i+1][D[i].first+j] |= Ddp[i][j];}}}vector<ll> ans;for(int b = 0; b < (1<<Csz);b++){if(Cdp[b] > X) continue;if(X-Cdp[b] > Dsum) continue;if(Ddp[Dsz][X-Cdp[b]]){for(int bb = 0; bb < Csz; bb++){if((b>>bb)&1) ans.push_back(C[bb].second);}ll now = Dsz;ll nowv = X - Cdp[b];while(now--){if(Ddp[now][nowv]) continue;if(Ddp[now][nowv-D[now].first]){nowv -= D[now].first;ans.push_back(D[now].second);}}break;}}if(ans.empty()) return "No";res = string(N,'x');for(auto v:ans) res[v] = 'o';return res;}int main(void) {cin.tie(0); ios_base::sync_with_stdio(false);cout << solve() << endl;return 0;}