oj.uz

답안 #68531

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
68531 2018-08-17T09:12:35 Z imeimi2000 절취선 (JOI14_ho_t5) C++17
100 / 100
 432 ms 66428 KB 
#include <iostream>
#include <algorithm>
#include <vector>
#include <queue>
#include <deque>
#include <set>
#include <map>
#include <unordered_map>
#include <functional>
#include <cstring>
#include <cmath>
#include <ctime>
#include <cstdlib>

using namespace std;
typedef long long llong;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<llong, llong> pll;

struct line {
    int x1, x2, y, i;
    line() {}
    line(int x1, int x2, int y, int i) : x1(x1), x2(x2), y(y), i(i) {}
} lx[100002], ly[100002];
int sx, sy;

struct event {
    int x1, x2, y, t, i;
    bool operator<(const event &p) const {
        if (y != p.y) return y < p.y;
        if (t != p.t) return t < p.t;
        return i < p.i;
    }
    event() {}
    event(int x1, int x2, int y, int t, int i)
        : x1(x1), x2(x2), y(y), t(t), i(i) {}
} ev[200008];
int sze;

int sum[1 << 19];
void update(int i, int s, int e, int x, int v) {
    if (s == e) {
        sum[i] += v;
        return;
    }
    int m = (s + e) / 2;
    if (x <= m) update(i << 1, s, m, x, v);
    else update(i << 1 | 1, m + 1, e, x, v);
    sum[i] = sum[i << 1] + sum[i << 1 | 1];
}

int query(int i, int s, int e, int x, int y) {
    if (e < x || y < s) return 0;
    if (x <= s && e <= y) return sum[i];
    int m = (s + e) / 2;
    return query(i << 1, s, m, x, y) + query(i << 1 | 1, m + 1, e, x, y);
}

int uf[100005];
int seg[1 << 19];
int find(int x) {
    if (uf[x]) return uf[x] = find(uf[x]);
    return x;
}
    
int merge(int x, int y) {
    if (x && y) {
        x = find(x);
        y = find(y);
        if (x == y) return 0;
        uf[x] = y;
        return 1;
    }
    return 0;
}

void lazy(int i) {
    if (seg[i]) {
        merge(seg[i], seg[i << 1]);
        merge(seg[i], seg[i << 1 | 1]);
        if (sum[i << 1]) seg[i << 1] = seg[i];
        if (sum[i << 1 | 1]) seg[i << 1 | 1] = seg[i];
        seg[i] = 0;
    }
}

void update1(int i, int s, int e, int x, int v) {
    if (s == e) {
        seg[i] = v;
        return;
    }
    lazy(i);
    int m = (s + e) / 2;
    if (x <= m) update1(i << 1, s, m, x, v);
    else update1(i << 1 | 1, m + 1, e, x, v);
}
    
void update2(int i, int s, int e, int x, int y, int v) {
    if (sum[i] == 0) return;
    if (e < x || y < s) return;
    if (x <= s && e <= y) {
        merge(seg[i], v);
        seg[i] = v;
        return;
    }
    lazy(i);
    int m = (s + e) / 2;
    update2(i << 1, s, m, x, y, v);
    update2(i << 1 | 1, m + 1, e, x, y, v);
}

int compx[200002], compy[200002];
int cpx, cpy;

int compress(int cp[], int sz, int x) {
    return lower_bound(cp, cp + sz, x) - cp + 1;
}

int main() {
    int w, h, n;
    scanf("%d%d%d", &w, &h, &n);
    for (int i = 0; i < n; ++i) {
        int a, b, c, d;
        scanf("%d%d%d%d", &a, &b, &c, &d);
        if (b == d) lx[sx++] = line(a, c, b, i + 1);
        else ly[sy++] = line(b, d, a, i + 1);
        compx[cpx++] = a;
        compy[cpy++] = b;
        compx[cpx++] = c;
        compy[cpy++] = d;
    }
    lx[sx++] = line(0, w, 0, n + 1);
    lx[sx++] = line(0, w, h, n + 2);
    ly[sy++] = line(0, h, 0, n + 3);
    ly[sy++] = line(0, h, w, n + 4);
    compx[cpx++] = 0;
    compx[cpx++] = w;
    compy[cpy++] = 0;
    compy[cpy++] = h;
    sort(compx, compx + cpx);
    cpx = unique(compx, compx + cpx) - compx;
    sort(compy, compy + cpy);
    cpy = unique(compy, compy + cpy) - compy;
    
    llong v = n + 4;
    
    for (int it = 0; it < sx; ++it) {
        line &i = lx[it];
        i.x1 = compress(compx, cpx, i.x1);
        i.x2 = compress(compx, cpx, i.x2);
        i.y = compress(compy, cpy, i.y);
        ev[sze++] = event(i.x1, i.x2, i.y, 1, i.i);
    }
    for (int it = 0; it < sy; ++it) {
        line &i = ly[it];
        i.x1 = compress(compy, cpy, i.x1);
        i.x2 = compress(compy, cpy, i.x2);
        i.y = compress(compx, cpx, i.y);
        ev[sze++] = event(i.y, 0, i.x1, 0, i.i);
        ev[sze++] = event(i.y, 0, i.x2, 2, i.i);
    }
    
    sort(ev, ev + sze);
    for (int it = 0; it < sze; ++it) {
        event &i = ev[it];
        if (i.t == 0) {
            update1(1, 1, cpx, i.x1, i.i);
            update(1, 1, cpx, i.x1, 1);
        }
        else if (i.t == 1) {
            update2(1, 1, cpx, i.x1, i.x2, i.i);
            v -= query(1, 1, cpx, i.x1, i.x2);
        }
        else {
            update1(1, 1, cpx, i.x1, 0);
            update(1, 1, cpx, i.x1, -1);
        }
    }
    llong cp = 0;
    for (int i = 1; i <= n + 4; ++i) {
        if (find(i) == i) ++cp;
    }
    printf("%lld\n", cp - v);
	return 0;
}

Compilation message

2014_ho_t5.cpp: In function 'int main()':
2014_ho_t5.cpp:122:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d%d", &w, &h, &n);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~
2014_ho_t5.cpp:125:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d%d%d", &a, &b, &c, &d);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 3 ms 492 KB Output is correct
3 Correct 2 ms 492 KB Output is correct
4 Correct 3 ms 492 KB Output is correct
5 Correct 3 ms 584 KB Output is correct
6 Correct 3 ms 584 KB Output is correct
7 Correct 4 ms 616 KB Output is correct
8 Correct 6 ms 752 KB Output is correct
9 Correct 5 ms 768 KB Output is correct
10 Correct 5 ms 784 KB Output is correct
11 Correct 6 ms 800 KB Output is correct
12 Correct 4 ms 800 KB Output is correct
13 Correct 4 ms 824 KB Output is correct
14 Correct 5 ms 840 KB Output is correct
15 Correct 4 ms 840 KB Output is correct
16 Correct 2 ms 840 KB Output is correct
17 Correct 2 ms 840 KB Output is correct

Subtask #2
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 3 ms 492 KB Output is correct
3 Correct 2 ms 492 KB Output is correct
4 Correct 3 ms 492 KB Output is correct
5 Correct 3 ms 584 KB Output is correct
6 Correct 3 ms 584 KB Output is correct
7 Correct 4 ms 616 KB Output is correct
8 Correct 6 ms 752 KB Output is correct
9 Correct 5 ms 768 KB Output is correct
10 Correct 5 ms 784 KB Output is correct
11 Correct 6 ms 800 KB Output is correct
12 Correct 4 ms 800 KB Output is correct
13 Correct 4 ms 824 KB Output is correct
14 Correct 5 ms 840 KB Output is correct
15 Correct 4 ms 840 KB Output is correct
16 Correct 2 ms 840 KB Output is correct
17 Correct 2 ms 840 KB Output is correct
18 Correct 2 ms 840 KB Output is correct
19 Correct 3 ms 840 KB Output is correct
20 Correct 4 ms 840 KB Output is correct
21 Correct 6 ms 892 KB Output is correct
22 Correct 5 ms 912 KB Output is correct
23 Correct 4 ms 932 KB Output is correct
24 Correct 5 ms 1012 KB Output is correct
25 Correct 5 ms 1120 KB Output is correct
26 Correct 5 ms 1120 KB Output is correct
27 Correct 8 ms 1120 KB Output is correct
28 Correct 6 ms 1136 KB Output is correct

Subtask #3
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 1136 KB Output is correct
2 Correct 4 ms 1136 KB Output is correct
3 Correct 3 ms 1136 KB Output is correct
4 Correct 4 ms 1244 KB Output is correct
5 Correct 25 ms 2428 KB Output is correct
6 Correct 127 ms 8704 KB Output is correct
7 Correct 318 ms 17788 KB Output is correct
8 Correct 267 ms 21820 KB Output is correct
9 Correct 270 ms 25652 KB Output is correct
10 Correct 254 ms 28520 KB Output is correct

Subtask #4
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 28520 KB Output is correct
2 Correct 5 ms 28520 KB Output is correct
3 Correct 37 ms 28520 KB Output is correct
4 Correct 2 ms 28520 KB Output is correct
5 Correct 4 ms 28520 KB Output is correct
6 Correct 401 ms 33876 KB Output is correct
7 Correct 21 ms 33876 KB Output is correct
8 Correct 178 ms 35088 KB Output is correct
9 Correct 207 ms 37360 KB Output is correct
10 Correct 201 ms 40616 KB Output is correct

Subtask #5
50.0 / 50.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 3 ms 492 KB Output is correct
3 Correct 2 ms 492 KB Output is correct
4 Correct 3 ms 492 KB Output is correct
5 Correct 3 ms 584 KB Output is correct
6 Correct 3 ms 584 KB Output is correct
7 Correct 4 ms 616 KB Output is correct
8 Correct 6 ms 752 KB Output is correct
9 Correct 5 ms 768 KB Output is correct
10 Correct 5 ms 784 KB Output is correct
11 Correct 6 ms 800 KB Output is correct
12 Correct 4 ms 800 KB Output is correct
13 Correct 4 ms 824 KB Output is correct
14 Correct 5 ms 840 KB Output is correct
15 Correct 4 ms 840 KB Output is correct
16 Correct 2 ms 840 KB Output is correct
17 Correct 2 ms 840 KB Output is correct
18 Correct 2 ms 840 KB Output is correct
19 Correct 3 ms 840 KB Output is correct
20 Correct 4 ms 840 KB Output is correct
21 Correct 6 ms 892 KB Output is correct
22 Correct 5 ms 912 KB Output is correct
23 Correct 4 ms 932 KB Output is correct
24 Correct 5 ms 1012 KB Output is correct
25 Correct 5 ms 1120 KB Output is correct
26 Correct 5 ms 1120 KB Output is correct
27 Correct 8 ms 1120 KB Output is correct
28 Correct 6 ms 1136 KB Output is correct
29 Correct 5 ms 1136 KB Output is correct
30 Correct 4 ms 1136 KB Output is correct
31 Correct 3 ms 1136 KB Output is correct
32 Correct 4 ms 1244 KB Output is correct
33 Correct 25 ms 2428 KB Output is correct
34 Correct 127 ms 8704 KB Output is correct
35 Correct 318 ms 17788 KB Output is correct
36 Correct 267 ms 21820 KB Output is correct
37 Correct 270 ms 25652 KB Output is correct
38 Correct 254 ms 28520 KB Output is correct
39 Correct 3 ms 28520 KB Output is correct
40 Correct 5 ms 28520 KB Output is correct
41 Correct 37 ms 28520 KB Output is correct
42 Correct 2 ms 28520 KB Output is correct
43 Correct 4 ms 28520 KB Output is correct
44 Correct 401 ms 33876 KB Output is correct
45 Correct 21 ms 33876 KB Output is correct
46 Correct 178 ms 35088 KB Output is correct
47 Correct 207 ms 37360 KB Output is correct
48 Correct 201 ms 40616 KB Output is correct
49 Correct 4 ms 40616 KB Output is correct
50 Correct 7 ms 40616 KB Output is correct
51 Correct 5 ms 40616 KB Output is correct
52 Correct 188 ms 40616 KB Output is correct
53 Correct 140 ms 42256 KB Output is correct
54 Correct 206 ms 44092 KB Output is correct
55 Correct 402 ms 53292 KB Output is correct
56 Correct 282 ms 57204 KB Output is correct
57 Correct 423 ms 61124 KB Output is correct
58 Correct 430 ms 64912 KB Output is correct
59 Correct 194 ms 64912 KB Output is correct
60 Correct 199 ms 64912 KB Output is correct
61 Correct 248 ms 64912 KB Output is correct
62 Correct 235 ms 64912 KB Output is correct
63 Correct 422 ms 66288 KB Output is correct
64 Correct 264 ms 66300 KB Output is correct
65 Correct 424 ms 66312 KB Output is correct
66 Correct 432 ms 66312 KB Output is correct
67 Correct 395 ms 66312 KB Output is correct
68 Correct 385 ms 66428 KB Output is correct
69 Correct 379 ms 66428 KB Output is correct
70 Correct 387 ms 66428 KB Output is correct
71 Correct 272 ms 66428 KB Output is correct
72 Correct 212 ms 66428 KB Output is correct