oj.uz

답안 #646965

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
646965 2022-10-01T08:40:10 Z ksu2009en Paths (RMI21_paths) C++17
19 / 100
 600 ms 9428 KB 
#pragma GCC optimize("O3,unroll-loops,Ofast")
#pragma GCC target("avx,avx2")

#include <iostream>
#include <vector>
#include <string>
#include <math.h>
#include <cmath>
#include <iomanip>
#include <cstdio>
#include <algorithm>
#include <map>
#include <set>
#include <queue>
#include <stack>
#include <deque>
#include <bitset>
#include <cstring>
#include <unordered_map>

#define endl '\n'

using namespace std;
typedef long long ll;

vector<vector< pair<pair<int, ll>, int> >>d;

ll mx = -1, pos = 0, local = 0;

void dfs(int v, int par, ll cost){
    if(cost > mx){
        mx = cost;
        pos = v;
    }
    
    for(auto i: d[v]){
        if(i.first.first != par){
            dfs(i.first.first, v, cost + (i.second != local ? i.first.second : 0));
        }
    }
}

bool dfs_2(int v, int par){
    if(v == pos)
        return true;
    
    for(auto &i: d[v]){
        if(i.first.first == par)
            continue;
        
        if(dfs_2(i.first.first, v)){
            i.second = local;
            return true;
        }
    }
    return false;
}

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    ll n, k;
    cin >> n >> k;
    
    d.resize(n + 1);
    
    for(int i = 0; i < n - 1; i++){
        ll x, y, c;
        cin >> x >> y >> c;
        
        d[x].push_back({{y, c}, 0});
        d[y].push_back({{x, c}, 0});
    }
    
    ll ans = 0;
    
    for(int root = 1; root <= n; root++){
        local = root;
        ans = 0;
        
        for(int step = 1; step <= k; step++){
            mx = -1, pos = 0;
            
            dfs(root, -1, 0);
            
            bool unused = dfs_2(root, -1);
            
            ans += mx;
        }
        cout << ans << endl;
    }
     
    return 0;
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:87:18: warning: unused variable 'unused' [-Wunused-variable]
   87 |             bool unused = dfs_2(root, -1);
      |                  ^~~~~~

Subtask #1
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 320 KB Output is correct

Subtask #2
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 320 KB Output is correct
3 Correct 14 ms 344 KB Output is correct
4 Correct 20 ms 340 KB Output is correct
5 Correct 11 ms 340 KB Output is correct
6 Correct 12 ms 340 KB Output is correct
7 Correct 14 ms 340 KB Output is correct

Subtask #3
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 320 KB Output is correct
3 Correct 14 ms 344 KB Output is correct
4 Correct 20 ms 340 KB Output is correct
5 Correct 11 ms 340 KB Output is correct
6 Correct 12 ms 340 KB Output is correct
7 Correct 14 ms 340 KB Output is correct
8 Execution timed out 1078 ms 404 KB Time limit exceeded
9 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 320 KB Output is correct
3 Correct 14 ms 344 KB Output is correct
4 Correct 20 ms 340 KB Output is correct
5 Correct 11 ms 340 KB Output is correct
6 Correct 12 ms 340 KB Output is correct
7 Correct 14 ms 340 KB Output is correct
8 Execution timed out 1078 ms 404 KB Time limit exceeded
9 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1063 ms 9428 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 32.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 320 KB Output is correct
3 Correct 14 ms 344 KB Output is correct
4 Correct 20 ms 340 KB Output is correct
5 Correct 11 ms 340 KB Output is correct
6 Correct 12 ms 340 KB Output is correct
7 Correct 14 ms 340 KB Output is correct
8 Execution timed out 1078 ms 404 KB Time limit exceeded
9 Halted 0 ms 0 KB -