Submission #1027221

#	Time	Username	Problem	Language	Result	Execution time	Memory
1027221		thdh__	Binaria (CCO23_day1problem1)	C++17	0 / 25	0 ms	2516 KiB

Main

#include <bits/stdc++.h>
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#pragma GCC target("avx,avx2,fma")
#define ll long long
#define pb push_back
#define eb emplace_back
#define pu push
#define ins insert
#define bruh ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define ff(x,a,b,c) for (auto x=a;x<=b;x+=c)
#define fd(x,a,b,c) for (auto x=a;x>=b;x-=c)
#define int ll

using namespace std;
//mt19937 mt(chrono::steady_clock::now().time_since_epoch().count());

typedef pair<int, int> ii;
const int N = 2e5+5;
const int mod = 1e6+3;
const int INF = 1e18;
using cd = complex<double>;
const long double PI = acos(-1);
int power(int a,int b) {ll x = 1;if (a >= mod) a%=mod; while (b) {if (b & 1) x = x*a % mod;a = a*a % mod;b>>=1;}return x;} 

int n,k;
int p[N],gt[N];

void solve()
{
	cin>>n>>k;
    for (int i=1;i<=n-k+1;i++) cin>>p[i];
    int m = n-k+1;
    for (int i=1;i<n-k+1;i++) 
    {
        if (abs(p[i]-p[i+1])>1) 
        {
            cout<<0; return;
        }
    }
    int cnt = 0,cnt1 = 0;
    for (int i=2;i<=min(k,n-k+1);i++)
    {
        if (p[i]==(p[i-1] + 1)) //so o vi tri i-1 phai = 1
        {
            cnt++;
        } else if ((p[i]+1)==p[i-1]) //so o vi tri i-1 phai la 0
        {
            cnt++; cnt1++;
        }
    }
    //cout<<cnt<<" "<<endl;
    int needed1 = p[1]-cnt1;
    //cout<<needed1<<endl;
    gt[0] = 1;
    for (int i=1;i<=k;i++) gt[i] = gt[i-1] * i;
    cout<<gt[k-cnt]/(gt[k-cnt-needed1] * gt[needed1]);
}

signed main()
{
	bruh
	//freopen("input.inp","r",stdin);
	//freopen("output.inp","w",stdout);
	int t = 1;
	//cin>>t;
	while (t--)
	{
		solve();
		cout<<"\n";
	}
}

Compilation message (stderr)

Main.cpp: In function 'void solve()':
Main.cpp:33:9: warning: unused variable 'm' [-Wunused-variable]
   33 |     int m = n-k+1;
      |         ^

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