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Submission #273466

# Submission time Handle Problem Language Result Execution time Memory
273466 2020-08-19T05:28:51 Z 반딧불(#5107) Mountains and Valleys (CCO20_day1problem3) C++17
0 / 25
 15 ms 14688 KB 
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

int n, m;
vector<int> link[500002];
int depth[500002];

void dfs(int x, int par = -1){
    for(auto &y: link[x]){
        if(y != par){
            depth[y] = depth[x] + 1;
            dfs(y, x);
        }
    }
}

int main(){
    scanf("%d %d", &n, &m);
    for(int i=1; i<=m; i++){
        int x, y, w;
        scanf("%d %d %d", &x, &y, &w);
        if(w==1) link[x].push_back(y), link[y].push_back(x);
    }

    dfs(1);
    int x = max_element(depth+1, depth+n+1) - depth;
    memset(depth, 0, sizeof(depth));
    dfs(x);

    printf("%d", 2*n-*max_element(depth+1, depth+n+1));
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:21:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   21 |     scanf("%d %d", &n, &m);
      |     ~~~~~^~~~~~~~~~~~~~~~~
Main.cpp:24:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   24 |         scanf("%d %d %d", &x, &y, &w);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0.0 / 1.0

# Verdict Execution time Memory Grader output
1 Incorrect 12 ms 13952 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0.0 / 2.0

# Verdict Execution time Memory Grader output
1 Incorrect 12 ms 13952 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0.0 / 2.0

# Verdict Execution time Memory Grader output
1 Incorrect 15 ms 14688 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0.0 / 6.0

# Verdict Execution time Memory Grader output
1 Incorrect 12 ms 13952 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0.0 / 2.0

# Verdict Execution time Memory Grader output
1 Incorrect 12 ms 13952 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0.0 / 3.0

# Verdict Execution time Memory Grader output
1 Incorrect 12 ms 13952 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0.0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 12 ms 13952 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0.0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 12 ms 13952 KB Output isn't correct
2 Halted 0 ms 0 KB -