#include <bits/stdc++.h>
using namespace std;
#define int long long
#define pii pair<int,int>
#define OK puts("OK");
#define NO puts("NO");
#define YES puts("YES");
#define fr first
#define sc second
#define ret return
#define scan1(a) scanf("%lld",&a);
#define scan2(a,b) scanf("%lld %lld",&a, &b);
#define scan3(a,b,c) scanf("%lld %lld %lld",&a,&b,&c);
#define all(s) s.begin(),s.end()
#define allr(s) s.rbegin(),s.rend()
#define pb push_back
#define sz(v) (int)v.size()
#define endi puts("");
const int N = 1e6+12,INF=1e9+7;
vector <int> g[N];
int l[N],cnt=1,n,m,w[N],ves[N],dp[200001][501];
void dfs(int x){
int t = cnt,i;
for (i=0;i<g[x].size();++i){
dfs(g[x][i]);
}
ves[cnt]=w[x];
l[cnt++]=t;
}
main(){
int s=0,i,j;
cin>>n>>m;
for (i=1;i<=n;++i){
int a,b;
cin>>a>>b;
w[i]=b;
if (a)
g[a].pb(i);
else s = i;
}
dfs(s);
for(int i = 0; i <= n; ++i)
for(int j = 1; j <= m; ++j)
dp[i][j] = -INF;
for (i=1;i<=n;++i){
for (j=1;j<=m;++j){
dp[i][j] = max(dp[i-1][j],dp[l[i]-1][j-1]+ves[i]);
}
}
cout <<dp[n][m];
}
Compilation message
biochips.cpp: In function 'void dfs(long long int)':
biochips.cpp:24:15: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
24 | for (i=0;i<g[x].size();++i){
| ~^~~~~~~~~~~~
biochips.cpp: At global scope:
biochips.cpp:33:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
33 | main(){
| ^~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
14 ms |
23756 KB |
Output is correct |
| 2 |
Correct |
11 ms |
23812 KB |
Output is correct |
| 3 |
Correct |
12 ms |
24212 KB |
Output is correct |
| 4 |
Correct |
28 ms |
58892 KB |
Output is correct |
| 5 |
Correct |
31 ms |
63332 KB |
Output is correct |
| 6 |
Correct |
32 ms |
63368 KB |
Output is correct |
| 7 |
Runtime error |
258 ms |
524292 KB |
Execution killed with signal 9 |
| 8 |
Halted |
0 ms |
0 KB |
- |
