Submission #249480

#	Time	Username	Problem	Language	Result	Execution time	Memory
249480		Vimmer	Uzastopni (COCI17_uzastopni)	C++14	72 / 80	800 ms	504 KiB

uzastopni

#include <bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>

#pragma GCC optimize("unroll-loops")
#pragma GCC optimize("-O3")
#pragma GCC optimize("Ofast")
//#pragma GCC optimize("fast-math")
//#pragma GCC optimize("no-stack-protector")

#define F first
#define S second
#define sz(x) int(x.size())
#define pb push_back
#define pf push_front
#define N 100010
#define M ll(1e9 + 7)
#define inf 1e9 + 1e9

using namespace std;
//using namespace __gnu_pbds;

typedef long double ld;
typedef long long ll;
typedef short int si;
typedef array <int, 6> a6;

//typedef tree <int, null_type, less_equal<int>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;


int main()
{
    //freopen("input.txt", "r", stdin); freopen("output4.txt", "w", stdout);

    ios_base::sync_with_stdio(0); istream::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    ll n;

    cin >> n;

    vector <pair <ll, ll> > ans; ans.clear();

    ll l = 1, r = 0, sum = 0;

    while (r <= 700000000 && r < n / 2)
    {
        while (sum > n) sum -= l++;

        if (sum == n) ans.pb({l, r});

        sum += ++r;
    }

    if (n % 2) ans.pb({n / 2, (n + 1) / 2});

    for (auto it : ans) cout << it.F << " " << it.S << '\n';
}

• Subtask 1: 72 / 80