제출 #197384

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
197384		stefdasca	새로운 문제 (POI11_sej)	C++14	100 / 100	556 ms	4792 KiB

sej

#include<bits/stdc++.h>
#define god dimasi5eks
#pragma GCC optimize("O3")
#define fi first
#define se second
#define pb push_back
#define pf push_front
#define mod 1000000007
#define dancila 3.14159265359
#define eps 1e-9

// #define fisier 1

using namespace std;

typedef long long ll;

ll n, k, m, ans = (1LL<<60);

ll cmmdc(ll a, ll b)
{
    ll c;
    while(b)
    {
        c = a%b;
        a = b;
        b = c;
    }
    return a;
}

vector<ll> primes;
set<ll> s;

void dfs(ll nod, bool chk)
{
    if(chk == 1)
        ans = min(ans, nod);
    s.insert(nod);
    for(int i = 0; i < primes.size(); ++i)
        if(nod % primes[i] == 0 && s.find(nod / primes[i]) == s.end())
            dfs(nod/primes[i], chk);
}
int main()
{

    #ifdef fisier
        ifstream f("input.in");
        ofstream g("output.out");
    #endif

    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cin >> n >> k;
    if(k == 1)
    {
        cout << n;
        return 0;
    }
    ll nn = n;
    for(ll i = 2; i * i <= n; ++i)
        if(n % i == 0)
        {
            primes.pb(i);
            while(n % i == 0)
                n /= i;
        }
    if(n > 1)
        primes.pb(n);
    for(int i = 1; i <= k; ++i)
    {
        ll p;
        cin >> p;
        dfs(cmmdc(p, nn), (i == k));
    }
    cout << nn/ans;
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

sej.cpp: In function 'void dfs(ll, bool)':
sej.cpp:40:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i = 0; i < primes.size(); ++i)
                    ~~^~~~~~~~~~~~~~~

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