Submission #242315

#	Time	Username	Problem	Language	Result	Execution time	Memory
242315		dantoh000	Magic Tree (CEOI19_magictree)	C++14	11 / 100	74 ms	6904 KiB

magictree

#include <bits/stdc++.h>
using namespace std;
int n,m,k;
int p[100005];
vector<int> G[100005];
int a[100005];
int L[100005];
int ans = 0;
int main(){
    scanf("%d%d%d",&n,&m,&k);
    for (int i = 2; i <= n; i++){
        scanf("%d",&p[i]);
        G[p[i]].push_back(i);
    }
    for (int i = 0; i < m; i++){
        int v,d,w;
        scanf("%d%d%d",&v,&d,&w);
        a[v] = d;
    }
    for (int i = 0; i <= n; i++) L[i] = 1000000005;
    for (int i = n; i >= 1; i--){
        if (a[i] == 0) continue;
        int pos = upper_bound(L,L+ans,a[i])-L;
        //printf("%d goes %d\n",a[i],pos);
        L[pos] = a[i];
        ans = max(ans,pos+1);
    }
    printf("%d",ans);
    //dfs(1,-1);
    //printf("%d",dp1[];
}

Compilation message (stderr)

magictree.cpp: In function 'int main()':
magictree.cpp:10:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d%d",&n,&m,&k);
     ~~~~~^~~~~~~~~~~~~~~~~~~
magictree.cpp:12:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&p[i]);
         ~~~~~^~~~~~~~~~~~
magictree.cpp:17:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d%d",&v,&d,&w);
         ~~~~~^~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 6
• Subtask 2: 0 / 3
• Subtask 3: 11 / 11
• Subtask 4: 0 / 12
• Subtask 5: 0 / 16
• Subtask 6: 0 / 13
• Subtask 7: 0 / 22
• Subtask 8: 0 / 17