제출 #634347

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
634347		inksamurai	Uzastopni (COCI17_uzastopni)	C++17	72 / 80	17 ms	312 KiB

uzastopni

#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0;i<n;i++)
#define rng(i,c,n) for(int i=c;i<n;i++)
#define per(i,n) for(int i=n-1;i>=0;i--)
#define fi first
#define se second
#define pb push_back
#define sz(a) (int)a.size()
#define vec(...) vector<__VA_ARGS__>
#define _3PGDklf ios::sync_with_stdio(0),cin.tie(0)
typedef long long ll;
using pii=pair<int,int>;
using vi=vector<int>;
void print(){cout<<'\n';}
template<class h,class...t>
void print(const h&v,const t&...u){cout<<v<<' ',print(u...);}
// e

signed main(){
_3PGDklf;
	#define int ll
	int n;
	cin>>n;
	auto f=[&](int l,int r){
		return (r*(r+1))/2-(l*(l+1))/2;
	};
	for(int len=2;len<=sqrt(2*n)+10;len++){
		int l=len,r=1e9;
		int c=-1;
		while(l<=r){
			int m=(l+r)/2;
			if(f(m-len,m)<n){
				l=m+1;
			}else{
				c=m,r=m-1;
			}
		}
		if(f(c-len,c)==n){
			cout<<c-len+1<<" "<<c<<"\n";
		}
	}
}

• Subtask 1: 72 / 80