Submission #386119

#	Time	Username	Problem	Language	Result	Execution time	Memory
386119		ak2006	Brunhilda’s Birthday (BOI13_brunhilda)	C++14	100 / 100	389 ms	116720 KiB

brunhilda

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using vb = vector<bool>;
using vvb = vector<vb>;
using vi = vector<int>;
using vvi = vector<vi>;
using vl = vector<ll>;
using vvl = vector<vl>;
using vc = vector<char>;
using vvc = vector<vc>;
const ll mod = 1e9 + 7,inf = 1e18;
#define pb push_back
#define fast ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
int main()
{
    fast;
    int n,t;
    cin>>n>>t;

    vi p(n),lp(1e7 + 5);
    vi dp(1e7 + 5);
    for (int i = 0;i<n;i++){
        cin>>p[i];
        for (int j = 0;j<=1e7;j+=p[i])lp[j] = p[i];
    }
    int ptr = 0;
    deque<int>a;
    a.push_back(0);
    for (int i = 1;i<=1e7;i++){
        while (ptr + lp[ptr] <= i)ptr++;
        while (!a.empty() && a.front() < ptr)a.pop_front();
        if (a.empty())dp[i] = 1e7 + 5;
        else dp[i] = 1 + dp[a.front()];
        while (!a.empty() && dp[a.back()] > dp[i])a.pop_back();
        a.push_back(i);
    }
    while (t--){
        int n;
        cin>>n;
        if (dp[n] > 1e7)cout<<"oo"<<'\n';
        else cout<<dp[n]<<'\n';
    }
    return 0;
}

• Subtask 1: 20 / 20
• Subtask 2: 20 / 20
• Subtask 3: 60 / 60