Submission #475366

#	Time	Username	Problem	Language	Result	Execution time	Memory
475366		HossamHero7	Rasvjeta (COCI17_rasvjeta)	C++14	10 / 50	1 ms	284 KiB

rasjveta

#include <bits/stdc++.h>

using namespace std;
typedef long long ll;
#define endl '\n'
void solve(){
    int n,m,k;
    cin>>n>>m>>k;
    vector <bool> vis(n+1);
    for(int i=0;i<m;i++){
        int x;
        cin>>x;
        for(int i=x;i>=max(x-k,1);i--){
            vis[i] = 1;
        }
        for(int i=x;i<=min(x+k,n);i++){
            vis[i] = 1;
        }
    }
    ll ans = 0;
    for(int i=1;i<=n;i++) {
        if(vis[i] == 0) ans ++;
    }
    double z = k;
    z *= 2;
    ans = ceil(ans/z);
    cout<<ans<<endl;
}
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);      cout.tie(0);
    int t=1;
    // cin>>t;
    while(t--){
        solve();
    }
    return 0;
}

• Subtask 1: 10 / 50