Submission #793942

#	Time	Username	Problem	Language	Result	Execution time	Memory
793942		ln_e	Finding Routers (IOI20_routers)	C++17	72.85 / 100	2 ms	300 KiB

routers

#include <bits/stdc++.h> //Andrei Alexandru a.k.a Sho
#include "routers.h"
using ll=long long;
using ld=long double;
int const INF=1000000005;
ll const LINF=1000000000000000005;
ll const mod=6700417;
ld const PI=3.14159265359;
ll const MAX_N=3e5+5;
ld const EPS=0.00000001;
#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#define f first
#define s second
#define pb push_back
#define mp make_pair
#define endl '\n'
#define sz(a) (int)a.size()
#define CODE_START  ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
using namespace std;
ll check(ll pos,ll indx){
	int x=use_detector(pos);
	if(x>=indx){
		return 1;
	}else return 0;
}
std::vector<int> find_routers(int st, int n, int q) {
    vector<int>ans;
    ans.pb(0);
    ll last=0;
    for(ll i=1;i<n;i++)
    {
    	ll l=last+1,r=st-2*(n-i-1),res=0;
    	while(l<=r){
    		ll mid=(l+r)/2;
    		if(check(mid,i)){
    			res=mid;
    			r=mid-1;
    		}else l=mid+1;
    	}
    	int pos=res+res-last-2;
    	ans.pb(min(pos,st));
    	last=pos;
    }
    return ans;
}

• Subtask 1: 16 / 16
• Subtask 2: 21 / 21
• Subtask 3: 23 / 23
• Subtask 4: 12.8512 / 40