oj.uz

Submission #32326

# Submission time Handle Problem Language Result Execution time Memory
32326 2017-10-09T03:17:21 Z dqhungdl File Paths (BOI15_fil) C++14
33 / 100
 156 ms 2144 KB 
#include <bits/stdc++.h>
using namespace std;

int n,m,k,s,Count=0,l[3005],P[3005],sum[3005],In[3005],Ou[3005];
vector<int> g[3005];

void DFS(int u,int len)
{
    In[u]=++Count;
    sum[u]=len;
    for(int i=0;i<g[u].size();i++)
        DFS(g[u][i],len+l[g[u][i]]);
    Ou[u]=Count;
}

bool Father(int u,int v)
{
    return (In[u]<=In[v]&&In[v]<=Ou[u]);
}

bool Check(int p,int len)
{
    int S=len,tmp=p;
    while(tmp>0)
    {
        S+=l[tmp];
        tmp=P[tmp];
    }
    for(int i=0;i<=n;i++)
        if(Father(i,p)==true)
            for(int j=0;j<=n;j++)
            {
                if(S+(sum[j]-sum[i]+s)==k)
                    return true;
                if(Father(i,j)==true&&(k-S)%(sum[j]-sum[i]+s)==0)
                    return true;
            }
    return false;
}

void Sub1()
{
    DFS(0,0);
    int p,len;
    for(int i=1;i<=m;i++)
    {
        cin>>p>>len;
        if(Check(p,len+1)==true)
            cout<<"YES\n";
        else
            cout<<"NO\n";
    }
}

int main()
{
    //freopen("FIL.INP","r",stdin);
    //freopen("FIL.OUT","w",stdout);
    scanf("%d%d%d%d",&n,&m,&k,&s);
    s++;
    for(int i=1;i<=n;i++)
    {
        scanf("%d%d",&P[i],&l[i]);
        l[i]++;
        g[P[i]].push_back(i);
    }
    if(n<=500&&m<=500)
        Sub1();
}

Compilation message

fil.cpp: In function 'void DFS(int, int)':
fil.cpp:11:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<g[u].size();i++)
                  ^
fil.cpp: In function 'int main()':
fil.cpp:59:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d%d%d",&n,&m,&k,&s);
                                  ^
fil.cpp:63:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d",&P[i],&l[i]);
                                  ^

Subtask #1
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 2144 KB Output is correct
2 Correct 0 ms 2144 KB Output is correct
3 Correct 9 ms 2144 KB Output is correct
4 Correct 79 ms 2144 KB Output is correct
5 Correct 29 ms 2144 KB Output is correct
6 Correct 6 ms 2144 KB Output is correct
7 Correct 156 ms 2144 KB Output is correct
8 Correct 3 ms 2144 KB Output is correct
9 Correct 6 ms 2144 KB Output is correct
10 Correct 0 ms 2144 KB Output is correct
11 Correct 3 ms 2144 KB Output is correct
12 Correct 49 ms 2144 KB Output is correct

Subtask #2
0 / 33.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 2144 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 34.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 2144 KB Output is correct
2 Correct 0 ms 2144 KB Output is correct
3 Correct 9 ms 2144 KB Output is correct
4 Correct 79 ms 2144 KB Output is correct
5 Correct 29 ms 2144 KB Output is correct
6 Correct 6 ms 2144 KB Output is correct
7 Correct 156 ms 2144 KB Output is correct
8 Correct 3 ms 2144 KB Output is correct
9 Correct 6 ms 2144 KB Output is correct
10 Correct 0 ms 2144 KB Output is correct
11 Correct 3 ms 2144 KB Output is correct
12 Correct 49 ms 2144 KB Output is correct
13 Incorrect 0 ms 2144 KB Output isn't correct
14 Halted 0 ms 0 KB -