Submission #1985119
Source Code Expand
#include <bits/stdc++.h>
#define FOR(i,a,b) for (int i=(a);i<(b);i++)
#define FORR(i,a,b) for (int i=(a);i>=(b);i--)
#define pb push_back
#define pcnt __builtin_popcount
#define show(x) cout<<#x<<" = "<<x<<endl;
#define maxs(x,y) x = max(x,y)
#define mins(x,y) x = min(x,y)
#define fi first
#define se second
#define rng(a) (a.begin()),(a.end())
#define each(it,c) for(__typeof((c).begin()) it=(c).begin();it!=(c).end();it++)
#define sz(x) (int)(x).size()
#define mp make_pair
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<pii> vpii;
typedef set<int> si;
typedef pair<ll,ll> pll;
typedef vector<ll> vl;
typedef vector<vl> vvl;
typedef vector<pll> vpll;
typedef set<ll> sl;
typedef __int128_t lll;
typedef pair<lll,lll> plll;
typedef vector<lll> vlll;
template<typename T>string join(vector<T>&v)
{stringstream s;FOR(i,0,sz(v))s<<' '<<v[i];return s.str().substr(1);}
ll gcd(ll a,ll b){if(a>b)swap(a,b);for(;a>0;b%=a,swap(a,b));return b;}
int modpow(ll a,ll n,int m){if(a==0)return a;ll p=1;for(;n>0;n/=2,a=a*a%m)if(n&1)p=p*a%m;return(int)p;}
void dout(double d){printf("%.12f\n",d);}
const int iinf = 1e9;
const ll linf = 1e18;
const int mod = 1e9+7;
const double pi = acos(-1);
const double eps = 1e-10;
struct Prime{
vl pl;
random_device rnd;
mt19937_64 mt;
Prime(){
mt = mt19937_64(rnd());
}
__int128_t mp(ll _a,ll n,ll m){
if(_a==0)return 0;
__int128_t a=_a, p=1;
for(;n>0;n/=2,a=a*a%m)if(n&1)p=p*a%m;
return p;
}
bool miller_rabin(ll _n){
__int128_t n, t, y;
ll a, d;
_n = abs(_n);
if(_n==2) return true;
if(_n==1||(_n&1)==0) return false;
// cout << "miller::" << _n << endl;
uniform_int_distribution<ll> dist(1, _n-1);
n = __int128_t(_n);
d = _n-1;
while((d&1)==0) d>>=1;
// cout << "d::" << d << endl;
FOR(i, 0, 100){
a = dist(mt);
t = d;
y = mp(a,t,_n);
while(t != _n-1 && y != 1 &&y != n-1){
y = (y*y)%_n;
t <<= 1;
}
if(y != _n-1 && (t&1) == 0) return false;
}
return true;
}
bool is_prime(ll a){
if(a < 2)return false;
each(itr, pl){
if(*itr * *itr > a)return true;
if(a%*itr == 0)return false;
}
return true;
}
void init(int a){
pl.resize(0);
pl.pb(2);
pl.pb(3);
int i = 5;
while(i <= a){
if(is_prime(i)) pl.pb(i);
i += 2;
if(is_prime(i)) pl.pb(i);
i += 4;
}
}
void prime_division(ll a, vpii&v){ // vに素因数分解の結果が入る
v.resize(0);
for(vl::iterator itr = pl.begin(); *itr * *itr <= a; itr++){
if(a%*itr == 0){
ll c = 0;
while((a%*itr) == 0){
a /= *itr;
c++;
}
v.pb(pii(*itr, c));
}
}
if(a > 1)v.pb(pii(a, 1));
}
void divisor(ll a, vl&v){ // v に約数が入る
v.pb(1);
for(vl::iterator itr = pl.begin(); *itr * *itr <= a; itr++){
if(a%*itr == 0){
ll b = 1, vs = sz(v);
while((a%*itr) == 0){
a /= *itr;
b *= *itr;
FOR(j, 0, vs)v.pb(v[j] * b);
}
}
}
if(a>1){
int vs = sz(v);
FOR(j, 0, vs)v.pb(v[j] * a);
}
}
};
ll n;
vl v;
Prime prime;
main(){
cin.tie(0);
ios::sync_with_stdio(false);
prime.init(100100);
cin >> n;
prime.divisor(n, v);
ll minv = linf;
each(itr, v) mins(minv, max(*itr, n / *itr));
int ans = 0;
while(minv > 0)ans++, minv /= 10;
cout << ans << endl;
return 0;
}
Submission Info
Judge Result
Set Name |
Sample |
All |
Score / Max Score |
0 / 0 |
300 / 300 |
Status |
|
|
Set Name |
Test Cases |
Sample |
sample_01.txt, sample_02.txt, sample_03.txt |
All |
sample_01.txt, sample_02.txt, sample_03.txt, subtask_1_1.txt, subtask_1_10.txt, subtask_1_11.txt, subtask_1_12.txt, subtask_1_2.txt, subtask_1_3.txt, subtask_1_4.txt, subtask_1_5.txt, subtask_1_6.txt, subtask_1_7.txt, subtask_1_8.txt, subtask_1_9.txt |
Case Name |
Status |
Exec Time |
Memory |
sample_01.txt |
AC |
10 ms |
636 KB |
sample_02.txt |
AC |
9 ms |
512 KB |
sample_03.txt |
AC |
9 ms |
512 KB |
subtask_1_1.txt |
AC |
9 ms |
512 KB |
subtask_1_10.txt |
AC |
9 ms |
512 KB |
subtask_1_11.txt |
AC |
9 ms |
512 KB |
subtask_1_12.txt |
AC |
9 ms |
512 KB |
subtask_1_2.txt |
AC |
9 ms |
512 KB |
subtask_1_3.txt |
AC |
9 ms |
512 KB |
subtask_1_4.txt |
AC |
9 ms |
512 KB |
subtask_1_5.txt |
AC |
9 ms |
512 KB |
subtask_1_6.txt |
AC |
9 ms |
512 KB |
subtask_1_7.txt |
AC |
9 ms |
512 KB |
subtask_1_8.txt |
AC |
9 ms |
512 KB |
subtask_1_9.txt |
AC |
9 ms |
512 KB |