oj.uz

답안 #624729

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
624729 2022-08-08T16:10:40 Z Vladth11 Roads (CEOI20_roads) C++14
60 / 100
 616 ms 44204 KB 
#include <bits/stdc++.h>
#define debug(x) cerr << #x << " " << x << "\n"
#define debugs(x) cerr << #x << " " << x << " "
 
using namespace std;
typedef long long ll;
typedef pair <long double, long double> pii;
 
const ll NMAX =200001;
const ll VMAX = 101;
const ll INF = 1e9;
const ll MOD = 1000000007;
const ll BLOCK = 447;
const ll base = 117;
const ll nr_of_bits = 18;
const ll inv2 = 500000004;
 
set <pii> exista;
 
struct event {
    pii x;
    int stare;
    bool operator < (const event a) {
        if(a.x.first != x.first) {
            return x.first < a.x.first;
        }
        return x.second < a.x.second; /// Nu ar trb sa aiba importanta, dar e necesar sa nu busesc sortarea
 
        if(a.stare != stare) {
            return stare > a.stare;
        }
    }
};
 
long double swipex;
 
struct segment {
    long double a, b, c, d;
    long double idx;
    long double gety() {
        if(c != a)
            return (long double)b + (long double)(swipex - a) * (long double)(d - b) / (long double)(c - a);
        else
            return (long double)b;
    }
} sgt[NMAX];
 
vector <event> events;
set <pii> already;
 
bool signs(long double a, long double b) {
    if(a < b)
        swap(a, b);
    if(a > 0 && b < 0)
        return 0;
    return 1;
}
 
long double cnt = 0;
 
void adauga(int a, int b) {
    if(a < b)
        swap(a, b);
    cnt++;
    segment first = sgt[a];
    segment second = sgt[b];
    if(first.a < second.a) {
        swap(first, second);
    } else if(first.a == second.a) {
        if(first.b < second.b) {
            swap(first, second);
        }
    } if(first.a >= second.c) {
        cout << (int)first.a << " " << (int)first.b << " " << (int)second.c << " " << (int)second.d << "\n";
        return;
    }
    if(second.a >= first.c) {
        cout <<(int)first.c << " " << (int)first.d << " " << (int)second.a << " " << (int)second.b << "\n";
        return;
    }
    cout << (int)first.a << " " << (int)first.b << " " << (int)second.a << " " << (int)second.b << "\n";
}
 
struct ura {
    long double first;
    int second;
    bool operator < (const ura a)const {
        if(a.second == -1 && second == -1) {
            return first < a.first;
        }
        if(a.second == -1) {
            return sgt[second].gety() < a.first;
        }
        if(second == -1) {
            return first < sgt[a.second].gety();
        }
        return sgt[second].gety() < sgt[a.second].gety();
    }
};
 
pii up[NMAX], down[NMAX];
 
int main() {
    //ifstream cin(".out");
    //ofstream cout(".out");
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int n, i;
    cin >> n;
    for(i = 1; i <= n; i++) {
        long double a, b, c, d;
        cin >> a >> b >> c >> d;
        if(a > c) {
            swap(b, d);
            swap(a, c);
        } else if(a == c) {
            if(b > d)
                swap(b, d); /// nu stiu daca e nevoie
        }
        sgt[i] = {a, b, c, d, i};
        exista.insert({a, b});
        exista.insert({c, d});
        events.push_back({{a, b}, i});
        events.push_back({{c, d}, -i});
    }
    n += 2;
  	for(i = 1; i <= n; i++) up[i] = down[i] = (pii){-INF, -INF};
    sgt[n - 1] = {-INF, -INF, INF, -INF, n - 1};
    events.push_back({{-INF, -INF}, n - 1});
    events.push_back({{INF, -INF}, -(n - 1)});
    sgt[n] = {-INF, INF, INF, INF, n};
    events.push_back({{-INF, INF}, n});
    events.push_back({{INF, INF}, -n});
    sort(events.begin(), events.end());
    set <ura> active;
    for(long double i = 0; i < events.size(); i++) {
        swipex = events[i].x.first;
        if(events[i].stare > 0) {
            active.insert({events[i].x.second, events[i].stare});
        } else {
            if(-events[i].stare < n - 1) {
                auto sus = active.lower_bound({sgt[-events[i].stare].gety(), -1});
                sus = prev(sus);
                auto jos = active.lower_bound({sgt[-events[i].stare].gety(), -1});
                jos = next(jos);
                int indS = (*sus).second;
                int indJ = (*jos).second;
                down[indS] = events[i].x;
                up[indJ] = events[i].x;
            }
            active.erase({events[i].x.second, -events[i].stare});
            continue;
        }
        if(events[i].stare > n - 2) continue;
        pair <pii, int> x = {events[i].x, events[i].stare};
        auto sus = active.lower_bound({x.first.second, -1});
        sus = prev(sus);
        auto jos = active.lower_bound({x.first.second, -1}); /// nu vrem daca trece chiar la limita sa-l ignor
        jos = next(jos);
        int indS = (*sus).second;
        int indJ = (*jos).second;
        pii maxim = max(down[indS], up[indJ]);
        if(maxim.first != -INF){
            cout << x.first.first << " " << x.first.second << " ";
            pii doilea;
            cout << (int)maxim.first << " " << (int)maxim.second << "\n";
        }
        up[indJ] = x.first;
        down[indS] = x.first;
        up[x.second] = x.first;
        down[x.second] = x.first;
    }
    //assert(cnt == n - 3);
    return 0;
 
}

Compilation message

roads.cpp: In function 'int main()':
roads.cpp:121:31: warning: narrowing conversion of 'i' from 'int' to 'long double' [-Wnarrowing]
  121 |         sgt[i] = {a, b, c, d, i};
      |                               ^
roads.cpp:129:44: warning: narrowing conversion of '(n - 1)' from 'int' to 'long double' [-Wnarrowing]
  129 |     sgt[n - 1] = {-INF, -INF, INF, -INF, n - 1};
      |                                          ~~^~~
roads.cpp:132:36: warning: narrowing conversion of 'n' from 'int' to 'long double' [-Wnarrowing]
  132 |     sgt[n] = {-INF, INF, INF, INF, n};
      |                                    ^

Subtask #1
0.0 / 0.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 198 ms 15460 KB Output is correct

Subtask #2
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 5 ms 724 KB Output is correct
4 Correct 45 ms 4832 KB Output is correct
5 Correct 126 ms 9196 KB Output is correct

Subtask #3
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 5 ms 724 KB Output is correct
4 Correct 39 ms 4864 KB Output is correct
5 Correct 81 ms 9140 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 4 ms 724 KB Output is correct
9 Correct 44 ms 4860 KB Output is correct
10 Correct 616 ms 43536 KB Output is correct

Subtask #4
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 5 ms 736 KB Output is correct
4 Correct 38 ms 4860 KB Output is correct
5 Correct 88 ms 9176 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 4 ms 724 KB Output is correct
9 Correct 38 ms 4832 KB Output is correct
10 Correct 214 ms 22748 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct

Subtask #5
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 4 ms 724 KB Output is correct
5 Correct 41 ms 4860 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 4 ms 732 KB Output is correct
9 Correct 42 ms 4780 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 2 ms 340 KB Output is correct
12 Correct 4 ms 740 KB Output is correct
13 Correct 39 ms 4756 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 2 ms 468 KB Output is correct
19 Correct 2 ms 468 KB Output is correct
20 Correct 4 ms 612 KB Output is correct
21 Correct 1 ms 344 KB Output is correct
22 Correct 16 ms 1824 KB Output is correct
23 Correct 20 ms 1808 KB Output is correct
24 Correct 36 ms 3460 KB Output is correct
25 Correct 1 ms 344 KB Output is correct

Subtask #6
0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 184 ms 15516 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 4 ms 724 KB Output is correct
6 Correct 42 ms 4760 KB Output is correct
7 Correct 82 ms 9360 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 4 ms 736 KB Output is correct
11 Correct 41 ms 4880 KB Output is correct
12 Correct 593 ms 44204 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 4 ms 724 KB Output is correct
16 Correct 39 ms 4840 KB Output is correct
17 Correct 220 ms 22844 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 2 ms 468 KB Output is correct
23 Correct 2 ms 468 KB Output is correct
24 Correct 4 ms 596 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 16 ms 1936 KB Output is correct
27 Correct 16 ms 1864 KB Output is correct
28 Correct 33 ms 3444 KB Output is correct
29 Correct 425 ms 28052 KB Output is correct
30 Correct 474 ms 38604 KB Output is correct
31 Correct 1 ms 340 KB Output is correct
32 Incorrect 367 ms 29432 KB Expected integer, but "-9.99964e+06" found
33 Halted 0 ms 0 KB -