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Submission #22994

# Submission time Handle Problem Language Result Execution time Memory
22994 2017-05-01T03:08:12 Z model_code Tug of War (BOI15_tug) C++11
100 / 100
 736 ms 9360 KB 
/* Tug of War
   Autor: Piotr Smulewicz
 */
#include <iostream>
#include <numeric>
#include <vector>
#include <cstdlib>
using namespace std;
const int SIZE = 30001;
const int MAX_STRENGHT = 20;
const int BACK_PACK_SIZE = SIZE * MAX_STRENGHT + 1;
int persons[SIZE * 2][2];
int str[SIZE * 2];
bool assigned[SIZE * 2];
vector<int> spots[SIZE * 2];
int item[BACK_PACK_SIZE];
unsigned int opt[SIZE * 2];
bool back_pack[BACK_PACK_SIZE + 1];
int n, j, s, a, b, pe, mi, k, sum_all, sum, res;
int main() {
  ios_base::sync_with_stdio(false);
  res = BACK_PACK_SIZE;
  cin >> n >> k;
  for (size_t i = 0; i < n * 2u; i++) {
    cin >> a >> b >> s;
    str[i] = s;
    persons[i][0] = a * 2;
    persons[i][1] = b * 2 + 1;
    spots[a * 2].push_back(i);
    spots[b * 2 + 1].push_back(i);
  }
  for (size_t s_pe = 0; s_pe < 2u * n; s_pe++) {
    pe = s_pe;
    while (!assigned[pe]) {
      for (j = 0; j < 2; j++) {
        mi = persons[pe][j];
        if (opt[mi] + 1 == spots[mi].size()) {
          assigned[pe] = true;
          sum += (1 - 2 * (mi % 2)) * str[pe];
          mi = persons[pe][1 - j];
          opt[mi]++;
          break;
        }
      }
      if (spots[mi].size() == opt[mi] + 1) {
        unsigned int poz = 0;
        while (assigned[spots[mi][poz]] && poz < spots[mi].size())
          poz++;
        if (poz < spots[mi].size())
          pe = spots[mi][poz];
        else
          break;
      } else
        break;
    }
  }
  item[abs(sum)]++;
  sum_all += abs(sum);
  for (int s_pe = 0; s_pe < 2 * n; s_pe++) {
    sum = 0;
    pe = s_pe;
    int st = 0;
    int mi2 = persons[pe][1];
    if (assigned[pe])
      continue;
    while (!assigned[pe]) {
      sum += (1 - 2 * st) * str[pe];
      assigned[pe] = true;
      mi = persons[pe][st];
      size_t poz = 0;
      while (poz < spots[mi].size() && assigned[spots[mi][poz]])
        poz++;
      if (poz < spots[mi].size())
        pe = spots[mi][poz];
      st = 1 - st;
    }
    if (mi != mi2) {
      cout << "NO" << endl;
      return 0;
    }
    if (sum != 0)
      item[abs(sum)]++;
    sum_all += abs(sum);
  }
  back_pack[0] = true;
  for (size_t i = 0; i < BACK_PACK_SIZE*1u; i++) {
    if (item[i] == 0u)
      continue;
    // cout<<"it"<<item[i]<<endl;
    for (int j = BACK_PACK_SIZE; j >= 0; --j) {
      if (back_pack[j]) {
        for (int l = 1; l <= item[i] && back_pack[j + l * i] == false; l++)
          back_pack[j + l * i] = true;
      }
    }
  }
  for (int j = BACK_PACK_SIZE; j >= 0; --j) {
    if (back_pack[j])
      res = min(res, abs(sum_all - 2 * j));
  }
  // cout<<"res "<<res<<" k: "<<k<<endl;
  if (res <= k)
    cout << "YES" << endl;
  else
    cout << "NO" << endl;
}

Subtask #1
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 7512 KB Output is correct
2 Correct 6 ms 7512 KB Output is correct
3 Correct 6 ms 7512 KB Output is correct
4 Correct 6 ms 7512 KB Output is correct
5 Correct 3 ms 7512 KB Output is correct
6 Correct 3 ms 7512 KB Output is correct
7 Correct 6 ms 7512 KB Output is correct
8 Correct 6 ms 7512 KB Output is correct
9 Correct 6 ms 7512 KB Output is correct
10 Correct 6 ms 7512 KB Output is correct
11 Correct 6 ms 7512 KB Output is correct
12 Correct 6 ms 7512 KB Output is correct
13 Correct 6 ms 7512 KB Output is correct
14 Correct 6 ms 7512 KB Output is correct
15 Correct 6 ms 7512 KB Output is correct
16 Correct 3 ms 7512 KB Output is correct
17 Correct 6 ms 7512 KB Output is correct
18 Correct 6 ms 7512 KB Output is correct
19 Correct 6 ms 7512 KB Output is correct
20 Correct 3 ms 7512 KB Output is correct
21 Correct 0 ms 7512 KB Output is correct
22 Correct 3 ms 7512 KB Output is correct
23 Correct 3 ms 7512 KB Output is correct
24 Correct 6 ms 7512 KB Output is correct
25 Correct 6 ms 7512 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 7512 KB Output is correct
2 Correct 6 ms 7512 KB Output is correct
3 Correct 6 ms 7512 KB Output is correct
4 Correct 6 ms 7512 KB Output is correct
5 Correct 3 ms 7512 KB Output is correct
6 Correct 3 ms 7512 KB Output is correct
7 Correct 6 ms 7512 KB Output is correct
8 Correct 6 ms 7512 KB Output is correct
9 Correct 6 ms 7512 KB Output is correct
10 Correct 6 ms 7512 KB Output is correct
11 Correct 6 ms 7512 KB Output is correct
12 Correct 6 ms 7512 KB Output is correct
13 Correct 6 ms 7512 KB Output is correct
14 Correct 6 ms 7512 KB Output is correct
15 Correct 6 ms 7512 KB Output is correct
16 Correct 3 ms 7512 KB Output is correct
17 Correct 6 ms 7512 KB Output is correct
18 Correct 6 ms 7512 KB Output is correct
19 Correct 6 ms 7512 KB Output is correct
20 Correct 3 ms 7512 KB Output is correct
21 Correct 0 ms 7512 KB Output is correct
22 Correct 3 ms 7512 KB Output is correct
23 Correct 3 ms 7512 KB Output is correct
24 Correct 6 ms 7512 KB Output is correct
25 Correct 6 ms 7512 KB Output is correct
26 Correct 13 ms 7644 KB Output is correct
27 Correct 159 ms 7644 KB Output is correct
28 Correct 16 ms 7644 KB Output is correct
29 Correct 149 ms 7644 KB Output is correct
30 Correct 9 ms 7644 KB Output is correct
31 Correct 159 ms 7644 KB Output is correct
32 Correct 13 ms 7644 KB Output is correct
33 Correct 153 ms 7644 KB Output is correct
34 Correct 9 ms 7644 KB Output is correct
35 Correct 149 ms 7644 KB Output is correct
36 Correct 16 ms 7644 KB Output is correct
37 Correct 159 ms 7644 KB Output is correct
38 Correct 13 ms 7644 KB Output is correct
39 Correct 149 ms 7644 KB Output is correct
40 Correct 16 ms 7644 KB Output is correct
41 Correct 156 ms 7644 KB Output is correct
42 Correct 13 ms 7644 KB Output is correct
43 Correct 149 ms 7644 KB Output is correct
44 Correct 23 ms 7644 KB Output is correct
45 Correct 156 ms 7644 KB Output is correct
46 Correct 13 ms 7644 KB Output is correct
47 Correct 3 ms 7644 KB Output is correct
48 Correct 19 ms 7644 KB Output is correct
49 Correct 16 ms 7644 KB Output is correct
50 Correct 16 ms 7644 KB Output is correct
51 Correct 16 ms 7644 KB Output is correct

Subtask #3
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 8040 KB Output is correct
2 Correct 9 ms 8040 KB Output is correct
3 Correct 6 ms 8040 KB Output is correct
4 Correct 9 ms 8040 KB Output is correct
5 Correct 6 ms 8040 KB Output is correct
6 Correct 9 ms 8040 KB Output is correct
7 Correct 6 ms 8040 KB Output is correct
8 Correct 9 ms 8040 KB Output is correct
9 Correct 13 ms 8040 KB Output is correct
10 Correct 6 ms 8040 KB Output is correct
11 Correct 13 ms 8040 KB Output is correct
12 Correct 9 ms 8040 KB Output is correct
13 Correct 13 ms 8040 KB Output is correct
14 Correct 9 ms 8040 KB Output is correct
15 Correct 9 ms 8040 KB Output is correct
16 Correct 9 ms 8040 KB Output is correct
17 Correct 9 ms 8040 KB Output is correct
18 Correct 13 ms 8040 KB Output is correct
19 Correct 9 ms 8040 KB Output is correct
20 Correct 6 ms 8040 KB Output is correct
21 Correct 9 ms 8040 KB Output is correct
22 Correct 13 ms 8172 KB Output is correct

Subtask #4
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 7512 KB Output is correct
2 Correct 6 ms 7512 KB Output is correct
3 Correct 6 ms 7512 KB Output is correct
4 Correct 6 ms 7512 KB Output is correct
5 Correct 3 ms 7512 KB Output is correct
6 Correct 3 ms 7512 KB Output is correct
7 Correct 6 ms 7512 KB Output is correct
8 Correct 6 ms 7512 KB Output is correct
9 Correct 6 ms 7512 KB Output is correct
10 Correct 6 ms 7512 KB Output is correct
11 Correct 6 ms 7512 KB Output is correct
12 Correct 6 ms 7512 KB Output is correct
13 Correct 6 ms 7512 KB Output is correct
14 Correct 6 ms 7512 KB Output is correct
15 Correct 6 ms 7512 KB Output is correct
16 Correct 3 ms 7512 KB Output is correct
17 Correct 6 ms 7512 KB Output is correct
18 Correct 6 ms 7512 KB Output is correct
19 Correct 6 ms 7512 KB Output is correct
20 Correct 3 ms 7512 KB Output is correct
21 Correct 0 ms 7512 KB Output is correct
22 Correct 3 ms 7512 KB Output is correct
23 Correct 3 ms 7512 KB Output is correct
24 Correct 6 ms 7512 KB Output is correct
25 Correct 6 ms 7512 KB Output is correct
26 Correct 13 ms 7644 KB Output is correct
27 Correct 159 ms 7644 KB Output is correct
28 Correct 16 ms 7644 KB Output is correct
29 Correct 149 ms 7644 KB Output is correct
30 Correct 9 ms 7644 KB Output is correct
31 Correct 159 ms 7644 KB Output is correct
32 Correct 13 ms 7644 KB Output is correct
33 Correct 153 ms 7644 KB Output is correct
34 Correct 9 ms 7644 KB Output is correct
35 Correct 149 ms 7644 KB Output is correct
36 Correct 16 ms 7644 KB Output is correct
37 Correct 159 ms 7644 KB Output is correct
38 Correct 13 ms 7644 KB Output is correct
39 Correct 149 ms 7644 KB Output is correct
40 Correct 16 ms 7644 KB Output is correct
41 Correct 156 ms 7644 KB Output is correct
42 Correct 13 ms 7644 KB Output is correct
43 Correct 149 ms 7644 KB Output is correct
44 Correct 23 ms 7644 KB Output is correct
45 Correct 156 ms 7644 KB Output is correct
46 Correct 13 ms 7644 KB Output is correct
47 Correct 3 ms 7644 KB Output is correct
48 Correct 19 ms 7644 KB Output is correct
49 Correct 16 ms 7644 KB Output is correct
50 Correct 16 ms 7644 KB Output is correct
51 Correct 16 ms 7644 KB Output is correct
52 Correct 13 ms 8040 KB Output is correct
53 Correct 9 ms 8040 KB Output is correct
54 Correct 6 ms 8040 KB Output is correct
55 Correct 9 ms 8040 KB Output is correct
56 Correct 6 ms 8040 KB Output is correct
57 Correct 9 ms 8040 KB Output is correct
58 Correct 6 ms 8040 KB Output is correct
59 Correct 9 ms 8040 KB Output is correct
60 Correct 13 ms 8040 KB Output is correct
61 Correct 6 ms 8040 KB Output is correct
62 Correct 13 ms 8040 KB Output is correct
63 Correct 9 ms 8040 KB Output is correct
64 Correct 13 ms 8040 KB Output is correct
65 Correct 9 ms 8040 KB Output is correct
66 Correct 9 ms 8040 KB Output is correct
67 Correct 9 ms 8040 KB Output is correct
68 Correct 9 ms 8040 KB Output is correct
69 Correct 13 ms 8040 KB Output is correct
70 Correct 9 ms 8040 KB Output is correct
71 Correct 6 ms 8040 KB Output is correct
72 Correct 9 ms 8040 KB Output is correct
73 Correct 13 ms 8172 KB Output is correct
74 Correct 53 ms 9360 KB Output is correct
75 Correct 716 ms 9360 KB Output is correct
76 Correct 49 ms 9360 KB Output is correct
77 Correct 719 ms 9360 KB Output is correct
78 Correct 46 ms 9360 KB Output is correct
79 Correct 59 ms 9360 KB Output is correct
80 Correct 716 ms 9360 KB Output is correct
81 Correct 59 ms 9360 KB Output is correct
82 Correct 33 ms 9360 KB Output is correct
83 Correct 49 ms 9360 KB Output is correct
84 Correct 723 ms 9360 KB Output is correct
85 Correct 66 ms 9360 KB Output is correct
86 Correct 736 ms 9360 KB Output is correct
87 Correct 46 ms 9360 KB Output is correct
88 Correct 716 ms 9360 KB Output is correct
89 Correct 46 ms 9360 KB Output is correct
90 Correct 719 ms 9360 KB Output is correct
91 Correct 63 ms 9360 KB Output is correct
92 Correct 719 ms 9360 KB Output is correct
93 Correct 53 ms 9360 KB Output is correct
94 Correct 29 ms 9228 KB Output is correct
95 Correct 56 ms 9360 KB Output is correct
96 Correct 53 ms 9360 KB Output is correct
97 Correct 49 ms 9360 KB Output is correct
98 Correct 43 ms 9360 KB Output is correct