Submission #493686

#	Time	Username	Problem	Language	Result	Execution time	Memory
493686		SangTin	Brunhilda’s Birthday (BOI13_brunhilda)	C++14	8.10 / 100	1086 ms	53652 KiB

brunhilda

#include <bits/stdc++.h>

using namespace std;

#define name "TRACKS"
#define endl '\n'
#define ednl endl
#define long long long
#define memset(a, x) memset(a, (x), sizeof(a));
#define inoutf freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout);
#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
#define IN(a, b, c) (a <= b && b <= c)

template<typename T, typename U> inline bool amin(T &x, U y) { if(y >= x) return 0; x = y; return 1;}
template<typename T, typename U> inline bool amax(T &x, U y) { if(x >= y) return 0; x = y; return 1;}
template<typename T> inline void read(T& x){
    bool Neg = false;
    char c;
    for (c = getchar(); c < '0' | c > '9'; c = getchar())
        if (c == '-') Neg = !Neg;
    x = c - '0';
    for (c = getchar(); c >= '0' && c <= '9'; c = getchar())
        x = x * 10 + c - '0';
    if (Neg) x = -x;
}

const int M = 1e5 + 83, N = 1e7 + 83;
int p[M], spf[N], m;
bool isPrime[N];
vector <int> Prime;

void Sieve(){
    memset(isPrime, 1);
    memset(spf, 0x3f);
    for (int i = 2; i < N; ++i){
        if (isPrime[i]){
            Prime.push_back(i);
            spf[i] = i;
        }
        for (int j = 0; j < Prime.size() && 1ll * i * Prime[j] < N && Prime[j] <= spf[i]; ++j){
            isPrime[i * Prime[j]] = 0;
            spf[i * Prime[j]] = Prime[j];
        }
    }
}

int cal(int n){
    if (n < p[m]) return 1;
    int cur = m, tmp = n;
    while (cur && tmp % p[cur] == 0){
        while (tmp % p[cur] == 0) tmp /= p[cur];
        --cur;
    }
    return (cur ? (1 + cal(n - n % p[cur])) : -1);
}

int Solve(){
    Sieve();
    int q; cin >> m >> q;
    for (int i = 1; i <= m; ++i){
        cin >> p[i];
    }
    sort(p + 1, p + m + 1);
    while (q--){
        int n; cin >> n;
        int tmp = cal(n);
        if (tmp == -1) cout << "oo\n";
        else cout << tmp << endl;
    }

    return 0;
}

int main(){
    fastio;

    int t = 1;
//    cin >> t;
    while (t--){
        Solve();
    }

    return 0;
}

Compilation message (stderr)

brunhilda.cpp: In function 'void Sieve()':
brunhilda.cpp:40:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |         for (int j = 0; j < Prime.size() && 1ll * i * Prime[j] < N && Prime[j] <= spf[i]; ++j){
      |                         ~~^~~~~~~~~~~~~~

• Subtask 1: 1.1111111111111112 / 20
• Subtask 2: 5.555555555555555 / 20
• Subtask 3: 1.4285714285714286 / 60