結果

問題 No.1330 Multiply or Divide
ユーザー rniyarniya
提出日時 2021-01-08 23:53:12
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 56 ms / 2,000 ms
コード長 4,175 bytes
コンパイル時間 1,860 ms
コンパイル使用メモリ 195,952 KB
最終ジャッジ日時 2025-01-17 14:45:36
ジャッジサーバーID
(参考情報)
judge3 / judge1
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ファイルパターン 結果
other AC * 46
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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;
const long long MOD=1000000007;
// const long long MOD=998244353;
#define LOCAL
#pragma region Macros
typedef long long ll;
typedef __int128_t i128;
typedef unsigned int uint;
typedef unsigned long long ull;
#define ALL(x) (x).begin(),(x).end()
const int INF=1e9;
const long long IINF=1e18;
const int dx[4]={1,0,-1,0},dy[4]={0,1,0,-1};
const char dir[4]={'D','R','U','L'};
template<typename T>
istream &operator>>(istream &is,vector<T> &v){
for (T &x:v) is >> x;
return is;
}
template<typename T>
ostream &operator<<(ostream &os,const vector<T> &v){
for (int i=0;i<v.size();++i){
os << v[i] << (i+1==v.size()?"": " ");
}
return os;
}
template<typename T,typename U>
ostream &operator<<(ostream &os,const pair<T,U> &p){
os << '(' << p.first << ',' << p.second << ')';
return os;
}
template<typename T,typename U,typename V>
ostream&operator<<(ostream &os,const tuple<T,U,V> &t){
os << '(' << get<0>(t) << ',' << get<1>(t) << ',' << get<2>(t) << ')';
return os;
}
template<typename T,typename U,typename V,typename W>
ostream&operator<<(ostream &os,const tuple<T,U,V,W> &t){
os << '(' << get<0>(t) << ',' << get<1>(t) << ',' << get<2>(t) << ',' << get<3>(t) << ')';
return os;
}
template<typename T,typename U>
ostream &operator<<(ostream &os,const map<T,U> &m){
os << '{';
for (auto itr=m.begin();itr!=m.end();){
os << '(' << itr->first << ',' << itr->second << ')';
if (++itr!=m.end()) os << ',';
}
os << '}';
return os;
}
template<typename T,typename U>
ostream &operator<<(ostream &os,const unordered_map<T,U> &m){
os << '{';
for (auto itr=m.begin();itr!=m.end();){
os << '(' << itr->first << ',' << itr->second << ')';
if (++itr!=m.end()) os << ',';
}
os << '}';
return os;
}
template<typename T>
ostream &operator<<(ostream &os,const set<T> &s){
os << '{';
for (auto itr=s.begin();itr!=s.end();){
os << *itr;
if (++itr!=s.end()) os << ',';
}
os << '}';
return os;
}
template<typename T>
ostream &operator<<(ostream &os,const multiset<T> &s){
os << '{';
for (auto itr=s.begin();itr!=s.end();){
os << *itr;
if (++itr!=s.end()) os << ',';
}
os << '}';
return os;
}
template<typename T>
ostream &operator<<(ostream &os,const unordered_set<T> &s){
os << '{';
for (auto itr=s.begin();itr!=s.end();){
os << *itr;
if (++itr!=s.end()) os << ',';
}
os << '}';
return os;
}
template<typename T>
ostream &operator<<(ostream &os,const deque<T> &v){
for (int i=0;i<v.size();++i){
os << v[i] << (i+1==v.size()?"": " ");
}
return os;
}
void debug_out(){cerr << '\n';}
template<class Head,class... Tail>
void debug_out(Head&& head,Tail&&... tail){
cerr << head;
if (sizeof...(Tail)>0) cerr << ", ";
debug_out(move(tail)...);
}
#ifdef LOCAL
#define debug(...) cerr << " ";\
cerr << #__VA_ARGS__ << " :[" << __LINE__ << ":" << __FUNCTION__ << "]" << '\n';\
cerr << " ";\
debug_out(__VA_ARGS__)
#else
#define debug(...) 42
#endif
template<typename T> T gcd(T x,T y){return y!=0?gcd(y,x%y):x;}
template<typename T> T lcm(T x,T y){return x/gcd(x,y)*y;}
template<class T1,class T2> inline bool chmin(T1 &a,T2 b){
if (a>b){a=b; return true;} return false;
}
template<class T1,class T2> inline bool chmax(T1 &a,T2 b){
if (a<b){a=b; return true;} return false;
}
#pragma endregion
const int MAX_LOG=40;
int main(){
cin.tie(0);
ios::sync_with_stdio(false);
int N,M,P; cin >> N >> M >> P;
vector<int> A(N); cin >> A;
int ans=INF;
vector<int> Max(MAX_LOG,-1);
for (int x:A){
int cnt=0;
while (x%P==0) ++cnt,x/=P;
chmax(Max[cnt],x);
}
int maxi=*max_element(ALL(A));
vector<ll> dp(MAX_LOG*MAX_LOG,0);
dp[0]=1;
for (int i=0;i<MAX_LOG*MAX_LOG;++i){
if (dp[i]*maxi>M){
ans=min(ans,i+1);
continue;
}
for (int j=0;j<MAX_LOG&&i+j+1<MAX_LOG*MAX_LOG;++j){
dp[i+j+1]=max(dp[i+j+1],dp[i]*Max[j]);
}
}
cout << (ans==INF?-1:ans) << '\n';
}
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