#include <bits/stdc++.h>
#define eb emplace_back
#define fi first
#define se second
#define all(v) v.begin(), v.end()
#define ends ' '
#define endl '\n'
#define fastio ios_base::sync_with_stdio(0), cin.tie(0)
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
const int maxn = 2e5 + 10;
const int maxm = 505;
int n, m, T = 0;
int p[maxn], t[maxn], d[maxn][maxm];
vector<int> root, adj[maxn];
vector<pii> v[maxn];
inline void rmax(int& r, int x) { r = max(r, x); }
void dfs(int u) {
int in = ++T;
for(auto v : adj[u]) dfs(v);
int out = T;
v[out].eb(in, t[u]);
}
int main(void) {
fastio;
cin >> n >> m;
int cnt = 0;
for(int i = 1; i <= n; ++i) {
cin >> p[i] >> t[i];
if(!p[i]) root.eb(i);
else adj[p[i]].eb(i);
}
assert(root.size() == 1);
for(auto& r : root) dfs(r);
for(int i = 1; i <= m; ++i) d[0][i] = INT_MIN;
for(int i = 1; i <= n; ++i) {
for(int j = 0; j <= m; ++j) d[i][j] = d[i - 1][j];
for(int j = 1; j <= m; ++j) {
for(auto [l, w] : v[i]) rmax(d[i][j], d[l - 1][j - 1] + w);
}
}
cout << d[n][m];
return 0;
}
Compilation message
biochips.cpp: In function 'int main()':
biochips.cpp:34:9: warning: unused variable 'cnt' [-Wunused-variable]
34 | int cnt = 0;
| ^~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
7 ms |
9728 KB |
Output is correct |
| 2 |
Runtime error |
39 ms |
19576 KB |
Execution killed with signal 11 |
| 3 |
Halted |
0 ms |
0 KB |
- |
