Submission #1205415

#	Time	Username	Problem	Language	Result	Execution time	Memory
1205415		friendiks	Sure Bet (CEOI17_sure)	C++20	0 / 100	0 ms	320 KiB

sure

#ifndef LOCAL
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#pragma GCC diagnostic ignored "-Wpedantic"
#endif

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

using namespace std;
using namespace __gnu_pbds;

auto seed = chrono::high_resolution_clock::now().time_since_epoch().count();
mt19937 rnd(52);
template<typename T>
using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
template<typename T, typename V>
using table = gp_hash_table<T, V>;

using i128 = __int128;
using ll = long long;
using ld = long double;
using uint = unsigned int;
using ull = unsigned long long;

const ll INF = 2e18;
const int inf = 2e9;
const int maxn = 1e5;
const int MOD = 988244353;
const ld pi = acos(-1);
const int P = 5167;
const int L = 26;
const ld EPS = 1e-7;

template<typename T, typename V>
void fill(T &container, V value) {
    for (auto &c: container)
        c = value;
}

#define int ll

pair<ld, ld> pls(pair<ld, ld> a, pair<ld, ld> b) {
    return {a.first + b.first, a.second + b.second};
}


void solve() {
    int n;
    cin >> n;
    vector<pair<ld, ld> > A(n);
    for (int i = 0; i < n; ++i) cin >> A[i].first >> A[i].second;
    for (int i = 0; i < n; ++i) {
        A[i].first--;
        A[i].second--;
    }
    sort(A.rbegin(), A.rend());
    pair<ld, ld> a = {-1, A[0].second}, b = {-1, A[0].first};
    for (int i = 1; i < n; ++i) {
        auto [x, y] = A[i];
        vector<pair<ld, ld> > v(4);
        v[0] = pls(a, make_pair(x, -1));
        v[1] = pls(a, make_pair(-1, y));
        v[2] = pls(b, make_pair(y, -1));
        v[3] = pls(b, make_pair(-1, x));
        for (int j = 0; j < 2; ++j) {
            if (v[j].first <= v[j].second) {
                a = max(a, v[j]);
            }
            if (v[j].second <= v[j].first) {
                swap(v[j].first, v[j].second);
                b = max(b, v[j]);
            }
        }
        for (int j = 2; j < 4; ++j) {
            if (v[j].first <= v[j].second) {
                b = max(b, v[j]);
            }
            if (v[j].second <= v[j].first) {
                swap(v[j].first, v[j].second);
                a = max(a, v[j]);
            }
        }
    }
    cout << abs(max(a.first, b.first));
}

signed main() {
#ifdef LOCAL
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#endif
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cout << fixed << setprecision(4);
    int t = 1;
    //cin >> t;
    while (t--) solve();
    //stress();
}

• Subtask 1: 0 / 20
• Subtask 2: 0 / 40
• Subtask 3: 0 / 40