#include <bits/stdc++.h>
using namespace std;
multiset<pair<int, int>> graph[60001];
bool visited[60001];
bitset<600001> possible;
int tot = 0, sm = 0;
void dfs(int node) {
visited[node] = true;
if (!graph[node].size()) return;
int nxt, cost;
tie(nxt, cost) = *graph[node].begin();
tot += cost;
if (!visited[nxt]) {
graph[nxt].erase(graph[nxt].find({node, -cost}));
graph[node].clear();
dfs(nxt);
}
}
int main() {
int n, k;
scanf("%d %d", &n, &k);
for (int i = 1; i <= 2 * n; i++) {
int l, r, s;
scanf("%d %d %d", &l, &r, &s);
graph[l].insert({n + r, s});
graph[n + r].insert({l, -s});
}
queue<int> q;
for (int i = 1; i <= 2 * n; i++) {
if (graph[i].size() == 1) q.push(i);
if (graph[i].size() == 0) return printf("NO\n"), 0;
}
while (q.size()) {
int curr = q.front();
q.pop();
if (graph[curr].size() == 0) return printf("NO\n"), 0;
int nxt, cost;
tie(nxt, cost) = *graph[curr].begin();
tot += cost;
graph[curr].clear();
graph[nxt].erase(graph[nxt].find({curr, -cost}));
if (graph[nxt].size() == 1) q.push(nxt);
}
vector<int> items;
if (tot) items.push_back(abs(tot));
for (int i = 1; i <= 2 * n; i++) if (!visited[i] && graph[i].size()) {
tot = 0;
graph[i].erase(graph[i].begin());
dfs(i);
if (tot) items.push_back(abs(tot));
}
sm = accumulate(items.begin(), items.end(), 0);
possible[0] = 1;
for (int i : items) possible |= possible << i;
for (int i = 0; i <= sm; i++)
if (possible[i] && abs(2 * i - sm) <= k)
return printf("YES\n"), 0;
printf("NO\n");
return 0;
}
Compilation message
tug.cpp: In function 'int main()':
tug.cpp:25:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
25 | scanf("%d %d", &n, &k);
| ~~~~~^~~~~~~~~~~~~~~~~
tug.cpp:28:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
28 | scanf("%d %d %d", &l, &r, &s);
| ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
3276 KB |
Output is correct |
| 2 |
Correct |
2 ms |
3276 KB |
Output is correct |
| 3 |
Correct |
3 ms |
3276 KB |
Output is correct |
| 4 |
Correct |
2 ms |
3276 KB |
Output is correct |
| 5 |
Correct |
2 ms |
3276 KB |
Output is correct |
| 6 |
Correct |
3 ms |
3276 KB |
Output is correct |
| 7 |
Correct |
3 ms |
3276 KB |
Output is correct |
| 8 |
Correct |
3 ms |
3276 KB |
Output is correct |
| 9 |
Correct |
3 ms |
3276 KB |
Output is correct |
| 10 |
Correct |
2 ms |
3276 KB |
Output is correct |
| 11 |
Correct |
2 ms |
3276 KB |
Output is correct |
| 12 |
Correct |
2 ms |
3276 KB |
Output is correct |
| 13 |
Correct |
3 ms |
3276 KB |
Output is correct |
| 14 |
Correct |
3 ms |
3276 KB |
Output is correct |
| 15 |
Correct |
2 ms |
3276 KB |
Output is correct |
| 16 |
Correct |
3 ms |
3276 KB |
Output is correct |
| 17 |
Correct |
2 ms |
3276 KB |
Output is correct |
| 18 |
Correct |
3 ms |
3276 KB |
Output is correct |
| 19 |
Correct |
3 ms |
3276 KB |
Output is correct |
| 20 |
Correct |
3 ms |
3276 KB |
Output is correct |
| 21 |
Correct |
2 ms |
3148 KB |
Output is correct |
| 22 |
Correct |
3 ms |
3276 KB |
Output is correct |
| 23 |
Correct |
2 ms |
3276 KB |
Output is correct |
| 24 |
Correct |
2 ms |
3276 KB |
Output is correct |
| 25 |
Correct |
3 ms |
3276 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
3276 KB |
Output is correct |
| 2 |
Correct |
2 ms |
3276 KB |
Output is correct |
| 3 |
Correct |
3 ms |
3276 KB |
Output is correct |
| 4 |
Correct |
2 ms |
3276 KB |
Output is correct |
| 5 |
Correct |
2 ms |
3276 KB |
Output is correct |
| 6 |
Correct |
3 ms |
3276 KB |
Output is correct |
| 7 |
Correct |
3 ms |
3276 KB |
Output is correct |
| 8 |
Correct |
3 ms |
3276 KB |
Output is correct |
| 9 |
Correct |
3 ms |
3276 KB |
Output is correct |
| 10 |
Correct |
2 ms |
3276 KB |
Output is correct |
| 11 |
Correct |
2 ms |
3276 KB |
Output is correct |
| 12 |
Correct |
2 ms |
3276 KB |
Output is correct |
| 13 |
Correct |
3 ms |
3276 KB |
Output is correct |
| 14 |
Correct |
3 ms |
3276 KB |
Output is correct |
| 15 |
Correct |
2 ms |
3276 KB |
Output is correct |
| 16 |
Correct |
3 ms |
3276 KB |
Output is correct |
| 17 |
Correct |
2 ms |
3276 KB |
Output is correct |
| 18 |
Correct |
3 ms |
3276 KB |
Output is correct |
| 19 |
Correct |
3 ms |
3276 KB |
Output is correct |
| 20 |
Correct |
3 ms |
3276 KB |
Output is correct |
| 21 |
Correct |
2 ms |
3148 KB |
Output is correct |
| 22 |
Correct |
3 ms |
3276 KB |
Output is correct |
| 23 |
Correct |
2 ms |
3276 KB |
Output is correct |
| 24 |
Correct |
2 ms |
3276 KB |
Output is correct |
| 25 |
Correct |
3 ms |
3276 KB |
Output is correct |
| 26 |
Correct |
47 ms |
3660 KB |
Output is correct |
| 27 |
Correct |
10 ms |
3708 KB |
Output is correct |
| 28 |
Correct |
48 ms |
3716 KB |
Output is correct |
| 29 |
Correct |
10 ms |
3660 KB |
Output is correct |
| 30 |
Correct |
50 ms |
3660 KB |
Output is correct |
| 31 |
Correct |
11 ms |
3608 KB |
Output is correct |
| 32 |
Correct |
46 ms |
3660 KB |
Output is correct |
| 33 |
Correct |
11 ms |
3660 KB |
Output is correct |
| 34 |
Correct |
8 ms |
3660 KB |
Output is correct |
| 35 |
Correct |
10 ms |
3700 KB |
Output is correct |
| 36 |
Correct |
47 ms |
3704 KB |
Output is correct |
| 37 |
Correct |
11 ms |
3640 KB |
Output is correct |
| 38 |
Correct |
46 ms |
3660 KB |
Output is correct |
| 39 |
Correct |
10 ms |
3660 KB |
Output is correct |
| 40 |
Correct |
47 ms |
3660 KB |
Output is correct |
| 41 |
Correct |
10 ms |
3660 KB |
Output is correct |
| 42 |
Correct |
49 ms |
3708 KB |
Output is correct |
| 43 |
Correct |
11 ms |
3640 KB |
Output is correct |
| 44 |
Correct |
46 ms |
3660 KB |
Output is correct |
| 45 |
Correct |
11 ms |
3660 KB |
Output is correct |
| 46 |
Correct |
46 ms |
3660 KB |
Output is correct |
| 47 |
Correct |
4 ms |
3532 KB |
Output is correct |
| 48 |
Correct |
26 ms |
3660 KB |
Output is correct |
| 49 |
Correct |
26 ms |
3660 KB |
Output is correct |
| 50 |
Correct |
49 ms |
3660 KB |
Output is correct |
| 51 |
Correct |
49 ms |
3644 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
15 ms |
5164 KB |
Output is correct |
| 2 |
Correct |
13 ms |
5068 KB |
Output is correct |
| 3 |
Correct |
13 ms |
5156 KB |
Output is correct |
| 4 |
Correct |
13 ms |
5144 KB |
Output is correct |
| 5 |
Correct |
14 ms |
5068 KB |
Output is correct |
| 6 |
Correct |
13 ms |
5068 KB |
Output is correct |
| 7 |
Correct |
16 ms |
5068 KB |
Output is correct |
| 8 |
Correct |
13 ms |
5068 KB |
Output is correct |
| 9 |
Correct |
13 ms |
5100 KB |
Output is correct |
| 10 |
Correct |
13 ms |
5068 KB |
Output is correct |
| 11 |
Correct |
13 ms |
5156 KB |
Output is correct |
| 12 |
Correct |
13 ms |
5044 KB |
Output is correct |
| 13 |
Correct |
14 ms |
5156 KB |
Output is correct |
| 14 |
Correct |
14 ms |
5068 KB |
Output is correct |
| 15 |
Correct |
13 ms |
5068 KB |
Output is correct |
| 16 |
Correct |
13 ms |
5056 KB |
Output is correct |
| 17 |
Correct |
15 ms |
5136 KB |
Output is correct |
| 18 |
Correct |
16 ms |
5068 KB |
Output is correct |
| 19 |
Correct |
13 ms |
5128 KB |
Output is correct |
| 20 |
Correct |
14 ms |
5116 KB |
Output is correct |
| 21 |
Correct |
13 ms |
5068 KB |
Output is correct |
| 22 |
Correct |
15 ms |
5068 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
3276 KB |
Output is correct |
| 2 |
Correct |
2 ms |
3276 KB |
Output is correct |
| 3 |
Correct |
3 ms |
3276 KB |
Output is correct |
| 4 |
Correct |
2 ms |
3276 KB |
Output is correct |
| 5 |
Correct |
2 ms |
3276 KB |
Output is correct |
| 6 |
Correct |
3 ms |
3276 KB |
Output is correct |
| 7 |
Correct |
3 ms |
3276 KB |
Output is correct |
| 8 |
Correct |
3 ms |
3276 KB |
Output is correct |
| 9 |
Correct |
3 ms |
3276 KB |
Output is correct |
| 10 |
Correct |
2 ms |
3276 KB |
Output is correct |
| 11 |
Correct |
2 ms |
3276 KB |
Output is correct |
| 12 |
Correct |
2 ms |
3276 KB |
Output is correct |
| 13 |
Correct |
3 ms |
3276 KB |
Output is correct |
| 14 |
Correct |
3 ms |
3276 KB |
Output is correct |
| 15 |
Correct |
2 ms |
3276 KB |
Output is correct |
| 16 |
Correct |
3 ms |
3276 KB |
Output is correct |
| 17 |
Correct |
2 ms |
3276 KB |
Output is correct |
| 18 |
Correct |
3 ms |
3276 KB |
Output is correct |
| 19 |
Correct |
3 ms |
3276 KB |
Output is correct |
| 20 |
Correct |
3 ms |
3276 KB |
Output is correct |
| 21 |
Correct |
2 ms |
3148 KB |
Output is correct |
| 22 |
Correct |
3 ms |
3276 KB |
Output is correct |
| 23 |
Correct |
2 ms |
3276 KB |
Output is correct |
| 24 |
Correct |
2 ms |
3276 KB |
Output is correct |
| 25 |
Correct |
3 ms |
3276 KB |
Output is correct |
| 26 |
Correct |
47 ms |
3660 KB |
Output is correct |
| 27 |
Correct |
10 ms |
3708 KB |
Output is correct |
| 28 |
Correct |
48 ms |
3716 KB |
Output is correct |
| 29 |
Correct |
10 ms |
3660 KB |
Output is correct |
| 30 |
Correct |
50 ms |
3660 KB |
Output is correct |
| 31 |
Correct |
11 ms |
3608 KB |
Output is correct |
| 32 |
Correct |
46 ms |
3660 KB |
Output is correct |
| 33 |
Correct |
11 ms |
3660 KB |
Output is correct |
| 34 |
Correct |
8 ms |
3660 KB |
Output is correct |
| 35 |
Correct |
10 ms |
3700 KB |
Output is correct |
| 36 |
Correct |
47 ms |
3704 KB |
Output is correct |
| 37 |
Correct |
11 ms |
3640 KB |
Output is correct |
| 38 |
Correct |
46 ms |
3660 KB |
Output is correct |
| 39 |
Correct |
10 ms |
3660 KB |
Output is correct |
| 40 |
Correct |
47 ms |
3660 KB |
Output is correct |
| 41 |
Correct |
10 ms |
3660 KB |
Output is correct |
| 42 |
Correct |
49 ms |
3708 KB |
Output is correct |
| 43 |
Correct |
11 ms |
3640 KB |
Output is correct |
| 44 |
Correct |
46 ms |
3660 KB |
Output is correct |
| 45 |
Correct |
11 ms |
3660 KB |
Output is correct |
| 46 |
Correct |
46 ms |
3660 KB |
Output is correct |
| 47 |
Correct |
4 ms |
3532 KB |
Output is correct |
| 48 |
Correct |
26 ms |
3660 KB |
Output is correct |
| 49 |
Correct |
26 ms |
3660 KB |
Output is correct |
| 50 |
Correct |
49 ms |
3660 KB |
Output is correct |
| 51 |
Correct |
49 ms |
3644 KB |
Output is correct |
| 52 |
Correct |
15 ms |
5164 KB |
Output is correct |
| 53 |
Correct |
13 ms |
5068 KB |
Output is correct |
| 54 |
Correct |
13 ms |
5156 KB |
Output is correct |
| 55 |
Correct |
13 ms |
5144 KB |
Output is correct |
| 56 |
Correct |
14 ms |
5068 KB |
Output is correct |
| 57 |
Correct |
13 ms |
5068 KB |
Output is correct |
| 58 |
Correct |
16 ms |
5068 KB |
Output is correct |
| 59 |
Correct |
13 ms |
5068 KB |
Output is correct |
| 60 |
Correct |
13 ms |
5100 KB |
Output is correct |
| 61 |
Correct |
13 ms |
5068 KB |
Output is correct |
| 62 |
Correct |
13 ms |
5156 KB |
Output is correct |
| 63 |
Correct |
13 ms |
5044 KB |
Output is correct |
| 64 |
Correct |
14 ms |
5156 KB |
Output is correct |
| 65 |
Correct |
14 ms |
5068 KB |
Output is correct |
| 66 |
Correct |
13 ms |
5068 KB |
Output is correct |
| 67 |
Correct |
13 ms |
5056 KB |
Output is correct |
| 68 |
Correct |
15 ms |
5136 KB |
Output is correct |
| 69 |
Correct |
16 ms |
5068 KB |
Output is correct |
| 70 |
Correct |
13 ms |
5128 KB |
Output is correct |
| 71 |
Correct |
14 ms |
5116 KB |
Output is correct |
| 72 |
Correct |
13 ms |
5068 KB |
Output is correct |
| 73 |
Correct |
15 ms |
5068 KB |
Output is correct |
| 74 |
Correct |
685 ms |
9264 KB |
Output is correct |
| 75 |
Correct |
74 ms |
8968 KB |
Output is correct |
| 76 |
Correct |
673 ms |
9248 KB |
Output is correct |
| 77 |
Correct |
73 ms |
8924 KB |
Output is correct |
| 78 |
Correct |
675 ms |
9236 KB |
Output is correct |
| 79 |
Correct |
684 ms |
10176 KB |
Output is correct |
| 80 |
Correct |
78 ms |
9788 KB |
Output is correct |
| 81 |
Correct |
77 ms |
9776 KB |
Output is correct |
| 82 |
Correct |
686 ms |
10060 KB |
Output is correct |
| 83 |
Correct |
671 ms |
10056 KB |
Output is correct |
| 84 |
Correct |
76 ms |
9736 KB |
Output is correct |
| 85 |
Correct |
678 ms |
10052 KB |
Output is correct |
| 86 |
Correct |
77 ms |
9796 KB |
Output is correct |
| 87 |
Correct |
682 ms |
10052 KB |
Output is correct |
| 88 |
Correct |
82 ms |
9880 KB |
Output is correct |
| 89 |
Correct |
679 ms |
10060 KB |
Output is correct |
| 90 |
Correct |
82 ms |
9752 KB |
Output is correct |
| 91 |
Correct |
689 ms |
10060 KB |
Output is correct |
| 92 |
Correct |
80 ms |
9732 KB |
Output is correct |
| 93 |
Correct |
684 ms |
10056 KB |
Output is correct |
| 94 |
Correct |
47 ms |
9668 KB |
Output is correct |
| 95 |
Correct |
368 ms |
9960 KB |
Output is correct |
| 96 |
Correct |
378 ms |
9976 KB |
Output is correct |
| 97 |
Correct |
705 ms |
9940 KB |
Output is correct |
| 98 |
Correct |
717 ms |
10052 KB |
Output is correct |
