結果

問題 No.332 数列をプレゼントに
ユーザー kei
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
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 5
other AC * 42
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

#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>
============================================================
=================================================================
=============================================================
================================================================
*/
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;
}
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