oj.uz

Submission #634346

# Submission time Handle Problem Language Result Execution time Memory
634346 2022-08-24T09:18:52 Z inksamurai Uzastopni (COCI17_uzastopni) C++17
80 / 80
 18 ms 316 KB 
#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=1e10;
		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
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 2 ms 212 KB Output is correct
9 Correct 7 ms 212 KB Output is correct
10 Correct 18 ms 316 KB Output is correct