oj.uz

답안 #589986

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
589986 2022-07-05T12:53:15 Z Dan4Life 친구 (IOI14_friend) C++17
19 / 100
 42 ms 65536 KB 
#include <bits/stdc++.h>
#if !defined(LOL)
    #include "friend.h"
#endif
using namespace std;
 
#define pb push_back
#define sz(a) (int)a.size()
#define all(a) a.begin(),a.end()
const int maxn = (int)2e5+10;
vector<int> adj[maxn];
int used[maxn];

void add_edge(int a, int b){
    adj[a].pb(b); adj[b].pb(a);
}

void add_friends(int a, int b){
    for(auto u : adj[a]) add_edge(u,b);
}

bool chk(int s){
    for(auto u : adj[s])
        if(used[u]) return false;
    return true;
}
int C[maxn], dp[maxn][3];

void dfs(int s, int p=-1){
    dp[s][0]=dp[s][1]=0; dp[s][1]=C[s];
    for(auto u : adj[s]){
        if(u==p) continue; dfs(u,s);
        dp[s][1]+=dp[u][0];
        dp[s][0]+=max(dp[u][0],dp[u][1]);
    }
}

int findSample(int n, int c[], int h[], int pro[])
{
    int ans = 0;
    for(int i = 0; i < n; i++) C[i]=c[i];
    for(int i = 1; i < n; i++){
        if(pro[i]!=1) add_edge(h[i],i);
        if(pro[i]) add_friends(h[i],i);
    }
    dfs(0,-1); return max(dp[0][0], dp[0][1]);
}

#if defined(LOL)

int main(void)
{
    #define __MAXSIZE__ 100002
    int confidence[__MAXSIZE__];
    int host[__MAXSIZE__];
    int protocol[__MAXSIZE__];
    int n,i;

    // Number of people
    assert(scanf("%d",&n)==1);
    
    // Confidence
    for(i=0;i<n;i++)
        assert(scanf("%d",&confidence[i])==1);
    
    // Host and Protocol
    for(i=1;i<n;i++)
        assert(scanf("%d %d",&host[i],&protocol[i])==2);
    
    // Answer
    printf("%d\n",findSample(n,confidence,host,protocol));
    return 0;
}
#endif

Compilation message

friend.cpp: In function 'void dfs(int, int)':
friend.cpp:32:9: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   32 |         if(u==p) continue; dfs(u,s);
      |         ^~
friend.cpp:32:28: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   32 |         if(u==p) continue; dfs(u,s);
      |                            ^~~
friend.cpp: In function 'int findSample(int, int*, int*, int*)':
friend.cpp:40:9: warning: unused variable 'ans' [-Wunused-variable]
   40 |     int ans = 0;
      |         ^~~

Subtask #1
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 4 ms 4948 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Runtime error 42 ms 65536 KB Execution killed with signal 9
8 Halted 0 ms 0 KB -

Subtask #2
0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 3 ms 4992 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 41 ms 65536 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #4
19.0 / 19.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 4 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 4 ms 5076 KB Output is correct
6 Correct 3 ms 5076 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 5 ms 5076 KB Output is correct
9 Correct 4 ms 4948 KB Output is correct
10 Correct 4 ms 4948 KB Output is correct
11 Correct 4 ms 5096 KB Output is correct
12 Correct 5 ms 5024 KB Output is correct
13 Correct 4 ms 5076 KB Output is correct
14 Correct 4 ms 4948 KB Output is correct
15 Correct 3 ms 5020 KB Output is correct

Subtask #5
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 3 ms 4948 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 31.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Runtime error 37 ms 65536 KB Execution killed with signal 9
4 Halted 0 ms 0 KB -