# |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
582411 |
2022-06-23T17:40:55 Z |
wdjpng |
Friend (IOI14_friend) |
C++17 |
|
3 ms |
2756 KB |
#include "friend.h"
#include <bits/stdc++.h>
#define int long long
#define rep(i,n) for(int i = 0; i < n; i++)
#define all(a) a.begin(), a.end()
using namespace std;
int N =1e5+1;
vector<vector<int>>mem(2,vector<int>(N,-1));
vector<vector<int>>E;
vector<int>conf(N);
int dfs(int v, int p, int allow)
{
if(mem[allow][v]!=-1) return mem[allow][v];
int s = 0;
for (int w : E[v]) if(w!=p) s+=dfs(w,v,true);
int s2=conf[v];
for (int w : E[v]) if(w!=p) s2+=dfs(w,v,false);
if(allow) return mem[allow][v]=max(s2,s);
return mem[allow][v]=s;
}
// Find out best sample
signed findSample(signed n,signed oorgconf[],signed host[],signed protocol[]){
vector<int>ops;
rep(i,n-1) ops.push_back(protocol[i+1]);
sort(all(ops));
ops.erase(unique(all(ops)), ops.end());
vector<int>without(n,0);
E.assign(n, vector<int>());
rep(i,n) conf[i]=oorgconf[i];
if(ops.size()==1)
{
int sum=0, maxx=0;
rep(i,n) maxx=max(maxx,conf[i]);
for(int x : conf) sum+=x;
if(ops[0]==1) // my friends are yours
{
return sum;
}
if(ops[2]) return maxx;
}
int best = conf[0];
for(int st = 1; st < n; st++)
{
if(protocol[st]==0)
{
// I am friend
E[host[st]].push_back(st);
}
}
return dfs(0,-1,true);
}
Compilation message
friend.cpp: In function 'int findSample(int, int*, int*, int*)':
friend.cpp:52:6: warning: unused variable 'best' [-Wunused-variable]
52 | int best = conf[0];
| ^~~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
2644 KB |
Output is correct |
2 |
Correct |
2 ms |
2644 KB |
Output is correct |
3 |
Correct |
2 ms |
2644 KB |
Output is correct |
4 |
Correct |
2 ms |
2644 KB |
Output is correct |
5 |
Correct |
3 ms |
2644 KB |
Output is correct |
6 |
Correct |
2 ms |
2644 KB |
Output is correct |
7 |
Correct |
3 ms |
2644 KB |
Output is correct |
8 |
Incorrect |
2 ms |
2644 KB |
Output isn't correct |
9 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
2644 KB |
Output is correct |
2 |
Correct |
2 ms |
2644 KB |
Output is correct |
3 |
Correct |
2 ms |
2644 KB |
Output is correct |
4 |
Correct |
2 ms |
2644 KB |
Output is correct |
5 |
Correct |
2 ms |
2644 KB |
Output is correct |
6 |
Correct |
2 ms |
2644 KB |
Output is correct |
7 |
Correct |
2 ms |
2644 KB |
Output is correct |
8 |
Correct |
3 ms |
2644 KB |
Output is correct |
9 |
Correct |
3 ms |
2644 KB |
Output is correct |
10 |
Correct |
2 ms |
2644 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
3 ms |
2644 KB |
Output is correct |
2 |
Correct |
2 ms |
2644 KB |
Output is correct |
3 |
Correct |
2 ms |
2644 KB |
Output is correct |
4 |
Correct |
2 ms |
2644 KB |
Output is correct |
5 |
Correct |
3 ms |
2644 KB |
Output is correct |
6 |
Correct |
2 ms |
2644 KB |
Output is correct |
7 |
Correct |
2 ms |
2644 KB |
Output is correct |
8 |
Correct |
2 ms |
2644 KB |
Output is correct |
9 |
Correct |
2 ms |
2588 KB |
Output is correct |
10 |
Correct |
2 ms |
2644 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
2644 KB |
Output is correct |
2 |
Correct |
2 ms |
2644 KB |
Output is correct |
3 |
Correct |
2 ms |
2644 KB |
Output is correct |
4 |
Correct |
2 ms |
2644 KB |
Output is correct |
5 |
Correct |
2 ms |
2756 KB |
Output is correct |
6 |
Correct |
3 ms |
2724 KB |
Output is correct |
7 |
Correct |
3 ms |
2644 KB |
Output is correct |
8 |
Correct |
3 ms |
2644 KB |
Output is correct |
9 |
Correct |
2 ms |
2644 KB |
Output is correct |
10 |
Correct |
2 ms |
2644 KB |
Output is correct |
11 |
Correct |
2 ms |
2644 KB |
Output is correct |
12 |
Correct |
2 ms |
2644 KB |
Output is correct |
13 |
Correct |
2 ms |
2644 KB |
Output is correct |
14 |
Correct |
2 ms |
2648 KB |
Output is correct |
15 |
Correct |
2 ms |
2644 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
3 ms |
2644 KB |
Output is correct |
2 |
Correct |
2 ms |
2644 KB |
Output is correct |
3 |
Correct |
2 ms |
2644 KB |
Output is correct |
4 |
Correct |
2 ms |
2644 KB |
Output is correct |
5 |
Incorrect |
2 ms |
2644 KB |
Output isn't correct |
6 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
2644 KB |
Output is correct |
2 |
Correct |
2 ms |
2644 KB |
Output is correct |
3 |
Correct |
2 ms |
2644 KB |
Output is correct |
4 |
Correct |
2 ms |
2644 KB |
Output is correct |
5 |
Correct |
2 ms |
2644 KB |
Output is correct |
6 |
Correct |
2 ms |
2644 KB |
Output is correct |
7 |
Incorrect |
3 ms |
2644 KB |
Output isn't correct |
8 |
Halted |
0 ms |
0 KB |
- |