Submission #173304

#	Time	Username	Problem	Language	Result	Execution time	Memory
173304		DeD_TihoN	Money (IZhO17_money)	C++14	0 / 100	2 ms	376 KiB

money

#include<bits/stdc++.h>
#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/tree_policy.hpp>
#define ff first
#define ss second
#define pb push_back
#define mp make_pair
#define ll long long
#define ld long double
#define all(a) a.begin(),a.end()
#define ull unsigned long long
#define endl '\n'
#define y1 yaumru
#define ios ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define iter vector<int>::iterator
#define int long long
using namespace std;
using namespace __gnu_pbds;

template<class T>
using ordered_set=tree<T,null_type,less<T>,rb_tree_tag,tree_order_statistics_node_update>;

template<class T>
using ordered_multiset=tree<T,null_type,less_equal<T>,rb_tree_tag,tree_order_statistics_node_update>;

mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());
mt19937_64 rnd1(chrono::steady_clock::now().time_since_epoch().count());

//find_by_order
//order_of_key

const int N=1e6+7;
const int inf=1e18+1e9;
const int mod=1e9+7;
const ld eps=1e-9;

int a[N];
int dp[N];
vector<pair<int,int>>b;

main ()
{
    ios;
    int n;
    cin>>n;
    for (int i=1;i<=n;++i){
        cin>>a[i];
        b.pb({a[i],i});
    }
    sort(all(b));
    int cur=1;
    for (int i=0;i<b.size();++i){
        a[b[i].ss]=cur;
        ++cur;
    }
    for (int i=1;i<=n;++i){
        dp[i]=inf;
        for (int j=i-1;j>=0;--j){
            bool cc=true;
            for (int k=j;k>=1;--k){
                if (a[j+1]<=a[k] && a[k]<=a[i]){
                    cc=false;
                    break;
                }
            }
            if (cc)dp[i]=min(dp[i],dp[j]+1);
            if (a[j]>a[j+1])break;
        }
    }
    cout<<dp[n]<<endl;
}

Compilation message (stderr)

money.cpp:41:7: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main ()
       ^
money.cpp: In function 'int main()':
money.cpp:52:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i=0;i<b.size();++i){
                  ~^~~~~~~~~

• Subtask 1: 0 / 9
• Subtask 2: 0 / 16
• Subtask 3: 0 / 20
• Subtask 4: 0 / 55