oj.uz

Submission #85251

# Submission time Handle Problem Language Result Execution time Memory
85251 2018-11-19T01:50:03 Z zoooma13 Biochips (IZhO12_biochips) C++14
0 / 100
 2000 ms 6788 KB 
#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];
void Solve(int v)
{
    int dp_new[M+1] = {0} ,dp_all[M+1] = {0};
    for(int i : Adj[v])
    {
        Solve(i);

        for(int j=1; j<=M; j++)
        for(int k=0; k<=M-j; k++)
            dp_new[j+k] = max(dp_new[j+k] ,dp_all[k] + dp[j]);

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

    for(int l=0; l<=M; l++)
        dp[l] = dp_all[l];
    dp[1] = max(dp[1] ,Mem[v]);
}

int main()
{
    scanf("%d%d",&N,&M); assert(N < MAX_N && M < MAX_M);

    int root;
    for(int i=1; i<=N; i++)
    {
        scanf("%d%d",&A,&B);

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

    Solve(root);
    printf("%d\n",dp[M]);
}

Compilation message

biochips.cpp: In function 'int main()':
biochips.cpp:36:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&N,&M); assert(N < MAX_N && M < MAX_M);
     ~~~~~^~~~~~~~~~~~~~
biochips.cpp:41:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d",&A,&B);
         ~~~~~^~~~~~~~~~~~~~
biochips.cpp:50:10: warning: 'root' may be used uninitialized in this function [-Wmaybe-uninitialized]
     Solve(root);
     ~~~~~^~~~~~

Subtask #1
0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 4984 KB Output is correct
2 Correct 6 ms 5236 KB Output is correct
3 Correct 6 ms 5236 KB Output is correct
4 Correct 31 ms 5472 KB Output is correct
5 Correct 44 ms 5472 KB Output is correct
6 Correct 67 ms 5472 KB Output is correct
7 Execution timed out 2068 ms 6788 KB Time limit exceeded
8 Halted 0 ms 0 KB -