oj.uz

Submission #37189

# Submission time Handle Problem Language Result Execution time Memory
37189 2017-12-22T10:35:49 Z szawinis Tropical Garden (IOI11_garden) C++14
100 / 100
 3871 ms 35920 KB 
#include "garden.h"
#include "gardenlib.h"
#include <iostream>
#include <vector>
#include <algorithm>
#include <cassert>
#include <tuple>
using namespace std;
const int N = 3e5 + 1, INF = 1e9+1;

int n, p, q, res[N], d[N];
vector<int> g[N], cycle;
vector<pair<int, int>> init_g[N];

int cycle_size;
bool mark[N];
void dfs(int u) {
  mark[u] = true;
  for(int v: g[u]) {
    if(!mark[v]) {
      d[v] = d[u] + 1;
      dfs(v);
    } else if(v == p) cycle_size = d[u] + 1;
  }
}

void calc() {
  fill(mark, mark+2*n, 0);
  fill(d, d+2*n, 0);
  cycle_size = 0;
  dfs(p);
}

int solve(int len) {
  int ret = 0;
  if(cycle_size) {
    for(int i = 0; i < n; i++) if(mark[i])
      ret += d[i] <= len && (len - d[i]) % cycle_size == 0;
  } else {
    for(int i = 0; i < n; i++) if(mark[i])
      ret += d[i] == len;
  }
  return ret;
}

void count_routes(int _n, int m, int _p, int _e[][2], int _q, int len[]) {
  n = _n, p = _p, q = _q;
  for(int i = 0; i < m; i++) {
    if(init_g[_e[i][0]].size() < 2)
      init_g[_e[i][0]].emplace_back(_e[i][1], i);
    if(init_g[_e[i][1]].size() < 2)
      init_g[_e[i][1]].emplace_back(_e[i][0], i);
  }
  for(int i = 0; i < n; i++) if(init_g[i].size() == 1) init_g[i].push_back(init_g[i][0]);
  for(int u = 0; u < n; u++) {
    for(int i = 0, v, idx; i < min((int)init_g[u].size(), 2); i++) {
      tie(v, idx) = init_g[u][i];
      g[v + (idx == init_g[v][0].second) * n].push_back(u + i * n);
    }
  }
  calc();
  for(int i = 0; i < q; i++) res[i] += solve(len[i]);
  p += n;
  calc();
  for(int i = 0; i < q; i++) res[i] += solve(len[i]);
  for(int i = 0; i < q; i++) answer(res[i]);
}

Subtask #1
49.0 / 49.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 14556 KB Output is correct
2 Correct 16 ms 14684 KB Output is correct
3 Correct 16 ms 14612 KB Output is correct
4 Correct 15 ms 14492 KB Output is correct
5 Correct 15 ms 14424 KB Output is correct
6 Correct 16 ms 14556 KB Output is correct
7 Correct 19 ms 14460 KB Output is correct
8 Correct 15 ms 14556 KB Output is correct
9 Correct 17 ms 14616 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 14556 KB Output is correct
2 Correct 16 ms 14684 KB Output is correct
3 Correct 16 ms 14612 KB Output is correct
4 Correct 15 ms 14492 KB Output is correct
5 Correct 15 ms 14424 KB Output is correct
6 Correct 16 ms 14556 KB Output is correct
7 Correct 19 ms 14460 KB Output is correct
8 Correct 15 ms 14556 KB Output is correct
9 Correct 17 ms 14616 KB Output is correct
10 Correct 15 ms 14456 KB Output is correct
11 Correct 29 ms 16504 KB Output is correct
12 Correct 52 ms 17728 KB Output is correct
13 Correct 70 ms 29320 KB Output is correct
14 Correct 197 ms 25628 KB Output is correct
15 Correct 224 ms 25896 KB Output is correct
16 Correct 170 ms 22768 KB Output is correct
17 Correct 153 ms 21576 KB Output is correct
18 Correct 54 ms 17912 KB Output is correct
19 Correct 198 ms 25596 KB Output is correct
20 Correct 236 ms 25900 KB Output is correct
21 Correct 176 ms 22720 KB Output is correct
22 Correct 152 ms 21616 KB Output is correct
23 Correct 206 ms 26816 KB Output is correct

Subtask #3
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 14556 KB Output is correct
2 Correct 16 ms 14684 KB Output is correct
3 Correct 16 ms 14612 KB Output is correct
4 Correct 15 ms 14492 KB Output is correct
5 Correct 15 ms 14424 KB Output is correct
6 Correct 16 ms 14556 KB Output is correct
7 Correct 19 ms 14460 KB Output is correct
8 Correct 15 ms 14556 KB Output is correct
9 Correct 17 ms 14616 KB Output is correct
10 Correct 15 ms 14456 KB Output is correct
11 Correct 29 ms 16504 KB Output is correct
12 Correct 52 ms 17728 KB Output is correct
13 Correct 70 ms 29320 KB Output is correct
14 Correct 197 ms 25628 KB Output is correct
15 Correct 224 ms 25896 KB Output is correct
16 Correct 170 ms 22768 KB Output is correct
17 Correct 153 ms 21576 KB Output is correct
18 Correct 54 ms 17912 KB Output is correct
19 Correct 198 ms 25596 KB Output is correct
20 Correct 236 ms 25900 KB Output is correct
21 Correct 176 ms 22720 KB Output is correct
22 Correct 152 ms 21616 KB Output is correct
23 Correct 206 ms 26816 KB Output is correct
24 Correct 16 ms 14428 KB Output is correct
25 Correct 146 ms 16584 KB Output is correct
26 Correct 206 ms 17836 KB Output is correct
27 Correct 1579 ms 29324 KB Output is correct
28 Correct 1419 ms 25968 KB Output is correct
29 Correct 1968 ms 26192 KB Output is correct
30 Correct 1155 ms 23040 KB Output is correct
31 Correct 1068 ms 21852 KB Output is correct
32 Correct 227 ms 17956 KB Output is correct
33 Correct 1418 ms 25976 KB Output is correct
34 Correct 1821 ms 26176 KB Output is correct
35 Correct 1152 ms 23224 KB Output is correct
36 Correct 1633 ms 21988 KB Output is correct
37 Correct 1122 ms 27192 KB Output is correct
38 Correct 3871 ms 35920 KB Output is correct