Submission #85196

#	Time	Username	Problem	Language	Result	Execution time	Memory
85196		zoooma13	Biochips (IZhO12_biochips)	C++14	0 / 100	7 ms	6136 KiB

biochips

#include <bits/stdc++.h>
using namespace std;

#define MAX_N 200005
#define MAX_M 502
#define INF 0x3f3f3f3f

int N ,M;
int A ,B;

int Mem[MAX_N];
vector <int> Adj[MAX_N];

int dp[MAX_M][MAX_M];
int Solve(int Q ,int M)
{
    if(Adj[Q].empty())
        return (M == 1 ? Mem[Q] : -INF);
    if(~dp[M][Q])
        return dp[M][Q];

    int dp_new[M+1] ,dp_all[M+1] = {0};
    for(int i : Adj[Q])
    {
        memset(dp_new ,-INF ,sizeof dp_new);

        for(int j=1; j<=M; j++)
        for(int h=0; h<=M-j; h++)
            dp_new[j+h] = max(dp_new[j+h] ,dp_all[h]+Solve(i ,j));

        for(int h=0; h<=M; h++)
            dp_all[h] = max(dp_all[h] ,dp_new[h]);
    }

    return dp[M][Q] = dp_all[M];
}

int main()
{
    scanf("%d%d",&N,&M);

    int root;
    for(int i=0; i<N; i++)
    {
        scanf("%d%d",&A,&B);

        Mem[i+1] = B;
        if(A == 0)
            root = i+1;
        else
            Adj[A].push_back(i+1);
    }

    memset(dp ,-1 ,sizeof dp);
    cout << Solve(root ,M) << endl;
}

Compilation message (stderr)

biochips.cpp: In function 'int main()':
biochips.cpp:40:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&N,&M);
     ~~~~~^~~~~~~~~~~~~~
biochips.cpp:45:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d",&A,&B);
         ~~~~~^~~~~~~~~~~~~~
biochips.cpp:55:26: warning: 'root' may be used uninitialized in this function [-Wmaybe-uninitialized]
     cout << Solve(root ,M) << endl;
                          ^

• Subtask 1: 0 / 100