oj.uz

Submission #250934

# Submission time Handle Problem Language Result Execution time Memory
250934 2020-07-19T13:30:03 Z imeimi2000 Park (JOI17_park) C++17
100 / 100
 545 ms 788 KB 
#include "park.h"
#include <vector>
#include <cstdlib>
 
using namespace std;
 
static int n;
 
static int place[1400];
static int check[1400];
static vector<int> edge[1400];
static int alive[1400];
static int ord[1400];
static int rev[1400];
 
void init() {
    for (int i = 0; i < n; ++i) place[i] = 0;
}
 
int imeAsk(int a, int b) {
    if (a == b) exit(1);
    if (a > b) swap(a, b);
    return Ask(a, b, place);
}
 
int isConnected(int x) {
    init();
    for (int i = 0; i < n; ++i) if (check[i] == 1) place[i] = 1;
    place[x] = 1;
    return imeAsk(0, x);
}
 
int findNearNode(int x) {
    int s = 1, e = n - 1;
    while (s < e) {
        int m = (s + e) / 2;
        init();
        for (int i = 0; i < n; ++i) if (check[i] == 1) place[i] = 1;
        for (int i = 0; i <= m; ++i) if (check[i] != -1) place[i] = 1;
        place[x] = 1;
        if (imeAsk(0, x)) e = m;
        else s = m + 1;
    }
    return s;
}
 
int tp;
void dfs(int x) {
    ord[x] = tp++;
    rev[ord[x]] = x;
    for (int i : edge[x]) {
        if (ord[i] != -1) continue;
        if (alive[i]) dfs(i);
    }
}
 
void del(int x) {
    alive[x] = 0;
    for (int i : edge[x]) {
        if (alive[i]) del(i);
    }
}
 
void findEdges(int x) {
    for (int i = 0; i < n; ++i) alive[i] = (check[i] == 1);
    for (int i = 0; i < n; ++i) {
        while (alive[i]) {
            for (int i = 0; i < n; ++i) ord[i] = -1, rev[i] = -1;
            tp = 0;
            dfs(i);
            for (int i = 0; i < n; ++i) place[i] = (ord[i] != -1);
            place[x] = 1;
            if (!imeAsk(i, x)) {
                del(i);
                break;
            }
            int s = 0, e = tp - 1;
            while (s < e) {
                int m = (s + e) / 2;
                init();
                for (int i = 0; i <= m; ++i) place[rev[i]] = 1;
                place[x] = 1;
                if (imeAsk(i, x)) e = m;
                else s = m + 1;
            }
            edge[rev[s]].push_back(x);
            edge[x].push_back(rev[s]);
            alive[rev[s]] = 0;
        }
    }
}
 
void solve(int x) {
    if (check[x]) return;
    check[x] = -1;
    while (!isConnected(x)) {
        int nxt = findNearNode(x);
        solve(nxt);
    }
    findEdges(x);
    check[x] = 1;
}
 
void Detect(int T, int N) {
    n = N;
    check[0] = 1;
    for (int i = 1; i < n; ++i) solve(i);
    for (int i = 0; i < n; ++i) {
        for (int j : edge[i]) {
            if (i < j) Answer(i, j);
        }
    }
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 10 ms 384 KB Output is correct
3 Correct 9 ms 384 KB Output is correct
4 Correct 18 ms 384 KB Output is correct
5 Correct 39 ms 384 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 543 ms 588 KB Output is correct
2 Correct 151 ms 512 KB Output is correct
3 Correct 211 ms 512 KB Output is correct
4 Correct 545 ms 716 KB Output is correct
5 Correct 540 ms 688 KB Output is correct

Subtask #3
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 284 ms 788 KB Output is correct
2 Correct 295 ms 632 KB Output is correct
3 Correct 286 ms 512 KB Output is correct
4 Correct 272 ms 632 KB Output is correct
5 Correct 319 ms 512 KB Output is correct
6 Correct 303 ms 672 KB Output is correct
7 Correct 277 ms 632 KB Output is correct
8 Correct 298 ms 760 KB Output is correct

Subtask #4
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 146 ms 504 KB Output is correct
2 Correct 344 ms 512 KB Output is correct
3 Correct 347 ms 764 KB Output is correct
4 Correct 392 ms 512 KB Output is correct
5 Correct 406 ms 768 KB Output is correct
6 Correct 398 ms 632 KB Output is correct
7 Correct 405 ms 768 KB Output is correct
8 Correct 356 ms 512 KB Output is correct
9 Correct 367 ms 652 KB Output is correct
10 Correct 401 ms 632 KB Output is correct
11 Correct 405 ms 760 KB Output is correct
12 Correct 333 ms 512 KB Output is correct
13 Correct 455 ms 788 KB Output is correct
14 Correct 362 ms 512 KB Output is correct
15 Correct 451 ms 512 KB Output is correct
16 Correct 288 ms 512 KB Output is correct
17 Correct 534 ms 768 KB Output is correct
18 Correct 378 ms 512 KB Output is correct
19 Correct 486 ms 636 KB Output is correct
20 Correct 371 ms 512 KB Output is correct

Subtask #5
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 388 ms 632 KB Output is correct
2 Correct 382 ms 676 KB Output is correct
3 Correct 321 ms 512 KB Output is correct
4 Correct 402 ms 764 KB Output is correct
5 Correct 369 ms 632 KB Output is correct
6 Correct 518 ms 632 KB Output is correct
7 Correct 418 ms 760 KB Output is correct
8 Correct 435 ms 760 KB Output is correct
9 Correct 419 ms 704 KB Output is correct
10 Correct 347 ms 632 KB Output is correct
11 Correct 370 ms 512 KB Output is correct
12 Correct 406 ms 776 KB Output is correct
13 Correct 365 ms 632 KB Output is correct
14 Correct 389 ms 632 KB Output is correct
15 Correct 370 ms 632 KB Output is correct
16 Correct 291 ms 760 KB Output is correct
17 Correct 530 ms 656 KB Output is correct
18 Correct 362 ms 632 KB Output is correct