Submission #1461689


Source Code Expand

#include<cstdio>
#include<vector>

using namespace std;

vector<int> G[300];
int h[300];

int dfs(int cur, int par) {
    int res=0;
    for(int v : G[cur]) {
        if(par == v) continue;
        res += dfs(v, cur);
    }
    if(h[cur] || res) res++;
    return res;
}

int main(void) {
    int n,x;
    scanf("%d%d",&n,&x);
    x--;

    for(int i=0; i<n; i++)
        scanf("%d", &h[i]);

    for(int i=0; i<n-1; i++) {
        int a,b;
        scanf("%d%d",&a,&b);
        a--, b--;
        G[a].push_back(b);
        G[b].push_back(a);
    }

    int res = dfs(x, -1);
    if(res) res--;
    printf("%d\n", res*2);
    return 0;
}

Submission Info

Submission Time
Task B - ツリーグラフ
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Language C++14 (GCC 5.4.1)
Score 100
Code Size 674 Byte
Status AC
Exec Time 1 ms
Memory 256 KB

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:21:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&n,&x);
                        ^
./Main.cpp:25:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &h[i]);
                           ^
./Main.cpp:29:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d",&a,&b);
                            ^

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 100 / 100
Status
AC × 2
AC × 20
Set Name Test Cases
Sample subtask0_sample_01.txt, subtask0_sample_02.txt
All subtask0_sample_01.txt, subtask0_sample_02.txt, subtask1_line01.txt, subtask1_line02.txt, subtask1_line03.txt, subtask1_line04.txt, subtask1_line05.txt, subtask1_line06.txt, subtask1_random01.txt, subtask1_random02.txt, subtask1_random03.txt, subtask1_random04.txt, subtask1_random05.txt, subtask1_random06.txt, subtask1_random07.txt, subtask1_random08.txt, subtask1_special01.txt, subtask1_special02.txt, subtask1_special03.txt, subtask1_special04.txt
Case Name Status Exec Time Memory
subtask0_sample_01.txt AC 1 ms 256 KB
subtask0_sample_02.txt AC 1 ms 256 KB
subtask1_line01.txt AC 1 ms 256 KB
subtask1_line02.txt AC 1 ms 256 KB
subtask1_line03.txt AC 1 ms 256 KB
subtask1_line04.txt AC 1 ms 256 KB
subtask1_line05.txt AC 1 ms 256 KB
subtask1_line06.txt AC 1 ms 256 KB
subtask1_random01.txt AC 1 ms 256 KB
subtask1_random02.txt AC 1 ms 256 KB
subtask1_random03.txt AC 1 ms 256 KB
subtask1_random04.txt AC 1 ms 256 KB
subtask1_random05.txt AC 1 ms 256 KB
subtask1_random06.txt AC 1 ms 256 KB
subtask1_random07.txt AC 1 ms 256 KB
subtask1_random08.txt AC 1 ms 256 KB
subtask1_special01.txt AC 1 ms 256 KB
subtask1_special02.txt AC 1 ms 256 KB
subtask1_special03.txt AC 1 ms 256 KB
subtask1_special04.txt AC 1 ms 256 KB