Submission #16861

#	Time	Username	Problem	Language	Result	Execution time	Memory
16861		murat	Biochips (IZhO12_biochips)	C++98	100 / 100	235 ms	480144 KiB

biochips

#include <bits/stdc++.h>

using namespace std;

#define dbgs(x) cerr << (#x) << " --> " << (x) << ' '
#define dbg(x) cerr << (#x) << " --> " << (x) << endl

#define foreach(i,x) for(type(x)i=x.begin();i!=x.end();i++)
#define FOR(ii,aa,bb) for(int ii=aa;ii<=bb;ii++)
#define ROF(ii,aa,bb) for(int ii=aa;ii>=bb;ii--)

#define type(x) __typeof(x.begin())

#define orta (bas + son >> 1)
#define sag (k + k + 1)
#define sol (k + k)

#define pb push_back
#define mp make_pair

#define nd second
#define st first

#define endl '\n'

typedef pair < int ,int > pii;

typedef long long ll;

const long long linf = 1e18+5;
const int mod = (int) 1e9 + 7;
const int logN = 17;
const int inf = 1e9 + 7;
const int N = 2e5 + 10;

int w[N], val[N], n, m, x, y, start[N], finish[N], T, dp[N][600], root, p[N];
vector< int > v[N];

int dfs(int node) {
    start[node] = ++T;
    w[T] = node;
    foreach(it, v[node])
        dfs(*it);
    finish[node] = T;
}

int main() {
    scanf("%d %d", &n, &m);
    FOR(i, 1, n) {
        scanf("%d %d", &x, &val[i]);
        if(!x) root = i;
        else v[x].pb(i);
    } dfs(root);
    FOR(i, 1, m) dp[n+1][i] = -inf;
    ROF(i, n, 1)
        FOR(j, 0, m)
            dp[i][j] = max(dp[i+1][j], (j != 0) * (dp[finish[w[i]] + 1][j-1] + val[w[i]]));
    printf("%d\n", dp[1][m]);
    return 0;
}

• Subtask 1: 100 / 100