Submission #587950

#	Time	Username	Problem	Language	Result	Execution time	Memory
587950		AriaH	Roller Coaster Railroad (IOI16_railroad)	C++17	0 / 100	144 ms	10684 KiB

railroad

#include "railroad.h"

/* Ignore Others Only Focus On Yourself! */
/* Im the Best! */

#pragma GCC optimize("O3")

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef long double ld;
typedef pair < int, int > pii;
typedef pair < ll, ll > pll;

#define F first
#define S second
#define all(x) x.begin(),x.end()
#define Mp make_pair
#define point complex
#define endl '\n'
#define SZ(x) (int)x.size()
#define fast_io ios::sync_with_stdio(0), cin.tie(0), cout.tie(0)
#define file_io freopen("input.txt", "r+", stdin); freopen("output.txt", "w+", stdout);
#define mashtali return cout << "Hello, World!", 0;

const int N = 1e6 + 10;
const int LOG = 20;
const ll mod = 1e9 + 7;
const ll inf = 8e18;
const double pi = acos(-1);
const ld eps = 1e-18;
const ld one = 1.;

ll pw(ll a, ll b, ll M, ll ret = 1) { if(a == 0) return 0; a %= M; while(b) { ret = (b & 1? ret * a % M : ret), a = a * a % M, b >>= 1; } return ret % M; }

mt19937 rng(time(nullptr));

vector < int > cm;

int ps[N];

int lwr(int x)
{
    return lower_bound(all(cm), x) - cm.begin();
}

ll plan_roller_coaster(vector < int > s, vector < int > t)
{
    int n = SZ(s);
    for(int i = 0; i < n; i ++)
    {
        cm.push_back(s[i]);
        cm.push_back(t[i]);
    }
    cm.push_back(-1e9 - 5);
    cm.push_back(1e9 + 5);
    sort(all(cm));
    cm.resize(unique(all(cm)) - cm.begin());
    for(int i = 0; i < n; i ++)
    {
        ///printf("here i = %d s = %d t = %d\n", i, s[i], t[i]);
        s[i] = lwr(s[i]);
        t[i] = lwr(t[i]);
        if(s[i] <= t[i])
        {
            ps[s[i]] --;
            ps[t[i]] ++;
        }
        else
        {
            ps[t[i]] ++;
            ps[s[i]] --;
        }
        ///printf("i = %d s = %d t = %d\n", i, s[i], t[i]);
    }
    ll tot = 0;
    for(int i = 1; i <= SZ(cm); i ++)
    {
        ///printf("i = %d ps = %d\n", i, ps[i]);
        ps[i] += ps[i - 1];
    }
    for(int i = 0; i < SZ(cm) - 1; i ++)
    {
        if(ps[i] >= -1) continue;
        tot += 1ll * (-1 - ps[i]) * (cm[i + 1] - cm[i]);
    }
    return tot;
}

• Subtask 1: 0 / 11
• Subtask 2: 0 / 23
• Subtask 3: 0 / 30
• Subtask 4: 0 / 36