Submission #988759

#	Time	Username	Problem	Language	Result	Execution time	Memory
988759		HD1	Binaria (CCO23_day1problem1)	C++14	0 / 25	1 ms	348 KiB

Main

//we all are lost trying to be someone
//The best way to predict the future is to create it
#include<bits/stdc++.h>
#define fastio ios_base::sync_with_stdio(0); cin.tie(0);
#define sz(x) ll(x.size())
#define all(x) x.begin(), x.end()
#define pb push_back
#define ff first
#define ss second
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<ll,ll> ii;
typedef pair<ii,ll> tri;
const ll mod=1e5;
const ll MAX=1e6;
ll n, k;
ll bin[MAX+20], A[MAX];
bool id[MAX+20];
ll perm(int k, int c){
    ll ans=1;
    for(int i=c+1; i<=k; i++){
        ans*=i;
        ans%=mod;
    }
    return ans;
}
void solve(){
    cin>>n>>k;
    ll aux=-1;
    ll pos=0;
    for(int i=0; i<n-k+1; i++){
        cin>>A[i];
        if(aux==-1){
            aux=A[i];
            continue;
        }
        if(aux!=A[i]){
            if(!id[pos%k]){
                id[pos%k]=true;
                if(A[i]>aux)bin[pos%k]=0;
                else bin[pos%k]=1;
            }
        }
        aux=A[i];
        pos++;
    }
    ll sum=0;
    ll cant=0;
    for(int i=0; i<k; i++){
        sum+=bin[i];
        if(!id[i])cant++;
        //cout<<bin[i]<<' ';
    }
    //cout<<endl;
    //cout<<cant<<' '<<A[0]-sum<<endl;
    cout<<perm(cant,A[0]-sum)<<'\n';
}
int main(){
    fastio;
    solve();
    return 0;
}

• Subtask 1: 0 / 3
• Subtask 2: 0 / 3
• Subtask 3: 0 / 4
• Subtask 4: 0 / 4
• Subtask 5: 0 / 4
• Subtask 6: 0 / 7