oj.uz

답안 #101523

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
101523 2019-03-19T03:37:19 Z rocketninja7 Chase (CEOI17_chase) C++14
20 / 100
 124 ms 10620 KB 
#include <cstdio>
#include <vector>
using namespace std;

vector<int> adjList[100001];

long long int p[100001];
bool vis[100001];

long long int dp(int bread, int node){
    if(bread==0){
        return 0;
    }
    vis[node]=true;
    long long int ans=0;
    long long int temp=0;
    for(int i=0;i<adjList[node].size();i++){
        if(!vis[adjList[node][i]]){
            temp+=p[adjList[node][i]];
        }
    }
    for(int i=0;i<adjList[node].size();i++){
        if(!vis[adjList[node][i]]){
            ans=max(ans, max(dp(bread, adjList[node][i]), dp(bread-1, adjList[node][i])+temp));
        }
    }
    return ans;
}

int main(){
    int n, v;
    scanf("%d%d", &n, &v);
    for(int i=1;i<n+1;i++){
        scanf("%lld", &p[i]);
    }
    for(int i=0;i<n-1;i++){
        int a, b;
        scanf("%d%d", &a, &b);
        adjList[a].push_back(b);
        adjList[b].push_back(a);
    }
    long long int ans=0;
    for(int i=1;i<n+1;i++){
        for(int j=1;j<n+1;j++){
            vis[j]=false;
        }
        ans=max(ans, dp(v, i));
        if(n>1000){
            break;
        }
    }
    printf("%lld", ans);
    return 0;
}

Compilation message

chase.cpp: In function 'long long int dp(int, int)':
chase.cpp:17:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<adjList[node].size();i++){
                 ~^~~~~~~~~~~~~~~~~~~~~
chase.cpp:22:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<adjList[node].size();i++){
                 ~^~~~~~~~~~~~~~~~~~~~~
chase.cpp: In function 'int main()':
chase.cpp:32:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &n, &v);
     ~~~~~^~~~~~~~~~~~~~~~
chase.cpp:34:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%lld", &p[i]);
         ~~~~~^~~~~~~~~~~~~~~
chase.cpp:38:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d", &a, &b);
         ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 2688 KB Output is correct
2 Correct 4 ms 2688 KB Output is correct
3 Correct 4 ms 2688 KB Output is correct
4 Correct 5 ms 2688 KB Output is correct
5 Correct 4 ms 2688 KB Output is correct
6 Correct 5 ms 2688 KB Output is correct

Subtask #2
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 2688 KB Output is correct
2 Correct 4 ms 2688 KB Output is correct
3 Correct 4 ms 2688 KB Output is correct
4 Correct 5 ms 2688 KB Output is correct
5 Correct 4 ms 2688 KB Output is correct
6 Correct 5 ms 2688 KB Output is correct
7 Incorrect 25 ms 2688 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #3
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 124 ms 10620 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 2688 KB Output is correct
2 Correct 4 ms 2688 KB Output is correct
3 Correct 4 ms 2688 KB Output is correct
4 Correct 5 ms 2688 KB Output is correct
5 Correct 4 ms 2688 KB Output is correct
6 Correct 5 ms 2688 KB Output is correct
7 Incorrect 25 ms 2688 KB Output isn't correct
8 Halted 0 ms 0 KB -