結果

問題 No.6 使いものにならないハッシュ
ユーザー Gara Gara
提出日時 2023-01-28 11:36:00
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 14 ms / 5,000 ms
コード長 5,242 bytes
コンパイル時間 2,171 ms
コンパイル使用メモリ 198,088 KB
最終ジャッジ日時 2025-02-10 07:27:52
ジャッジサーバーID
(参考情報)
judge4 / judge2
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ファイルパターン 結果
other AC * 32
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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;
///////////////////////////////////////////////////
/// Variables ///
///////////////////////////////////////////////////
#define ll long long
#define REP(x,n) for(int x=0;x<n;x++)
#define REPll(x,n) for(ll int x=0;x<n;x++)
#define REP2(x,l,r) for(int x=l;x<r;x++)
#define REP2ll(x,l,r) for(ll int x=l;x<r;x++)
#define all(x) (x).begin(),(x).end()
#define rall(x) (x).rbegin(),(x).rend()
const ll int MOD=1000000007;
const ll int MOD2=998244353;
const int INF=1<<30;
const ll int INF2=(ll)1<<60;
const double PI = 3.1415926535897932;
///////////////////////////////////////////////////
/// Debug Function ///
///////////////////////////////////////////////////
/* debug fucoverload
https://o-treetree.hatenablog.com/entry/2020/06/11/220242
debug(a,b,c): a,b,c.
DEBUG,lDEBUG:
*/
namespace /* debug */{
#define DEBUG(...) do{cout<<#__VA_ARGS__<<" = "; debug(__VA_ARGS__);}while(0) //
#define ldebug(...) do{cout<<"["<<setw(3)<<__LINE__<<"] "; debug(__VA_ARGS__);}while(0) //
#define lDEBUG(...) do{cout<<"["<<setw(3)<<__LINE__<<"] "<<#__VA_ARGS__<<" = "; debug(__VA_ARGS__);}while(0) //,
template <class T> void show(T &x){cout<<x<<" ";}
template <class T> void showendl(T &x){cout<<x<<endl;}
template <class P, class Q> void show(pair<P, Q> &x){cout<<"("<<x.first<<", "<<x.second<<") ";}
template <class P, class Q> void showendl(pair<P, Q> &x){cout<<"("<<x.first<<", "<<x.second<<")"<<endl;}
template <class H> void debug(H&& h){showendl(h);}
template <class H, class... Ts> void debug(H&& h, Ts&&... ts){show(h);debug(forward<Ts>(ts)...);}
template <class T> void debug(vector<T> &vt){int i=0;int size = vt.size();for(auto x: vt)++i!=size ? show(x) : showendl(x);}
template <class T> void debug(vector<vector<T>> &vt){int i=0;int size = vt.size();for(int k=0; k<size; k++){int size_k = vt[k].size();for(auto x:
        vt[k])++i!=size_k ? show(x) : showendl(x);i=0;}}
template <class T> void debug(deque<T> &vt){int i=0;int size = vt.size();for(auto x: vt)++i!=size ? show(x) : showendl(x);}
template <class T> void debug(stack<T> s){int i=0;int size = s.size();while(!s.empty()){T w = s.top();++i!=size ? show(w) : showendl(w);s.pop
        ();}}
template <class T> void debug(queue<T> s){int i=0;int size = s.size();while(!s.empty()){T w = s.front();++i!=size ? show(w) : showendl(w);s.pop
        ();}}
template <class T> void debug(priority_queue<T> s){int i=0;int size = s.size();while(!s.empty()){T w = s.top();++i!=size ? show(w) : showendl(w
        );s.pop();}}
}
///////////////////////////////////////////////////
/// Function / Library ///
///////////////////////////////////////////////////
// a^b // O(logb)
ll intpow(ll a,ll b){ ll ans = 1; while(b){if(b & 1) {ans *= a;} a *= a; b /= 2;}return ans;}
// a^b mod p // O(logb)
ll modpow(ll a, ll b, ll p){ll ans = 1; while(b){if(b & 1) {(ans *= a) %= p;} (a *= a) %= p; b /= 2;}return ans;}
// %
ll mod(ll val, ll m) {ll res = val % m; if (res < 0) res += m; return res;}
// mod. m a a^{-1} : gcd(a, m) = 1
ll modinv(ll a, ll m) {ll b = m, u = 1, v = 0; while (b) {ll t = a / b; a -= t * b; swap(a, b); u -= t * v; swap(u, v);} u %= m; if (u < 0) u += m;
    return u;}
template<class T> inline bool chmin(T& a, T b) {if (a > b) {a = b;return true;}return false;}
template<class T> inline bool chmax(T& a, T b) {if (a < b) {a = b;return true;}return false;}
// vector // O()
template<class T> vector<T> num_digit (T a){string ss = to_string(a);int size = ss.size();vector<T> v(size);for(int i=0; i<size; i++){v[i] = ss[i] -
    '0';}return v;}
template<class T> ll int digit_length(T a){string ss = to_string(a);return (ll int)ss.size();}
// gcd() // O(log(min(a,b)))
ll int gcd(ll int a, ll int b){if (a%b == 0){return(b);}else{return(gcd(b, a%b));}}
// lcm// O(log(min(a,b)))
ll int lcm(ll int a, ll int b){return a / gcd(a, b) * b;}
/////////////////////////////////////////////////////////////
int cal_hash(int x){
while(1){
vector<int> num = num_digit(x);
x = 0;
REP(i, (int)num.size()){
x += num[i];
}
if(x < 10){
return x;
}
}
}
int main (){
// ifstream in("input.txt");
// cin.rdbuf(in.rdbuf());
//
int n = 200010;
bitset<1000000> is_prime(0); //
for (int i = 2; i <= n; ++i) is_prime.set(i); //
for (int i = 2; i <= n; ++i) {
if (is_prime[i]) { // i
for (int j = i * 2; j <= n; j += i) {
is_prime.reset(j); // i
}
}
}
int K, N; cin >> K >> N;
vector<int> pri;
REP2(i, K, N+1){
if(is_prime[i]) pri.push_back(i);
}
int ans = 0;
int smax = 0;
int ps = pri.size();
REP(i,ps){
int jm = min(i+10, ps);
int s = 0;
vector<int> cnt(10, 0);
REP2(j,i,jm){
int h = cal_hash(pri[j]);
if(!cnt[h]){
cnt[h] = 1;
s++;
}else{
break;
}
}
if(smax <= s){
smax = max(smax, s);
ans = pri[i];
}
}
cout << ans << endl;
}
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