Submission #370986

#	Time	Username	Problem	Language	Result	Execution time	Memory
370986		Atill83	Uzastopni (COCI17_uzastopni)	C++14	72 / 80	2 ms	364 KiB

uzastopni

#include <bits/stdc++.h>
#define ff first
#define ss second
#define endl '\n'
using namespace std;
const long long INF = (long long) 1e18;
const int mod = (int) 1e9+7;
const int MAXN = (int) 3e5+5;

typedef long long ll;
typedef unsigned long long ull;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
ll n;

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);cout.tie(nullptr);

    #ifdef Local
        freopen("C:/Users/Admin/Desktop/Yazilim/C/IO/int.txt","r",stdin);
        freopen("C:/Users/Admin/Desktop/Yazilim/C/IO/out.txt","w",stdout);
    #endif

    cin>>n;
    vector<pll> ans;
    for(ll x = 2; x * x < 2*n; x++){
        //cerr<<x<<endl;
        if(2 * n % x == 0){
            ll b = (2 * n + x * (x - 1))/ (2 * x),
               a = b - x;
            //cerr<<x<<" "<<a<<" "<<b<<endl;
            if(0 <= a && a < b)
                if((b * (b + 1) / 2 - a * (a + 1) / 2 == n))
                    ans.push_back({a + 1, b});
        }
    }

    sort(ans.begin(), ans.end());
    for(pii u: ans)
        cout<<u.ff<<" "<<u.ss<<endl;

    #ifdef Local
        cout<<endl<<fixed<<setprecision(2)<<1000.0 * clock() / CLOCKS_PER_SEC<< " milliseconds ";
    #endif
}

• Subtask 1: 72 / 80