Submission #1019616

#	Time	Username	Problem	Language	Result	Execution time	Memory
1019616		Minbaev	Odd-even (IZhO11_oddeven)	C++17	0 / 100	1 ms	348 KiB

oddeven

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp> 
 
#pragma GCC target("avx,avx2,fma")
#pragma GCC optimize("Ofast,unroll-loops")
 
using namespace std;
using namespace __gnu_pbds;
 
#define pb push_back
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define f first
#define s second
#define int long long
#define pii pair<int,int>
 
template<class T>bool umax(T &a,T b){if(a<b){a=b;return true;}return false;}
template<class T>bool umin(T &a,T b){if(b<a){a=b;return true;}return false;}
 
template<class T>
using Tree = tree<T, null_type, less<T>, rb_tree_tag,
    tree_order_statistics_node_update>;
 
const int inf = 1e17 + 7;
const int mod = 1e9 + 7;
const int N = 3e5 + 5;

int binpow(int a, int b){
	if(b == 0)return 1;
	if(b % 2 == 0){
		int c = binpow(a,b/2);
		return (c*c)%mod;
	}
	return (binpow(a,b-1)*a)%mod;
}

int divi(int a, int b){
	return (a*(binpow(b,mod-2)))%mod;
}

int n,m,k;

void solve(){
	
	cin >> n;
	
	int l = 1,r = 1e9, ans = -1;
	while(l<=r){
		int mid = (l+r)/2;
		
		int sum = mid*(mid+1)/2;
		if(sum >= n){
			ans = mid;
			r = mid - 1;
		}
		else l = mid + 1;
	}
	
	int val = 0;
	val = ((ans*(ans+1)/2)-ans)*2+(ans-1)+1 - (ans*(ans+1)/2-n)*2;
	cout << val << "\n";
	
	
	
	
}
 
 signed main()
{
//	freopen("seq.in", "r", stdin);
//  freopen("seq.out", "w", stdout);

	ios_base::sync_with_stdio(0);cin.tie(NULL);cout.tie(NULL);
	int tt=1;//cin>>tt;
	while(tt--)solve();
 
}
 

• Subtask 1: 0 / 100