oj.uz

답안 #424521

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
424521 2021-06-12T04:14:33 Z tengiz05 Designated Cities (JOI19_designated_cities) C++17
7 / 100
 283 ms 32036 KB 
#include <bits/stdc++.h>
using i64 = long long;
constexpr int N = 2e5;
std::vector<std::pair<int, int>> e[N];
int n, upedge[N];
i64 dp[N];
void dfs(int u, int p) {
    dp[u] = 0;
    for (auto [v, w] : e[u]) {
        if (v == p) {
            upedge[u] = w;
        }
    }
    for (auto [v, w] : e[u]) {
        if (v != p) {
            dfs(v, u);
            dp[u] += dp[v] + upedge[v];
        }
    }
}
i64 ans[N];
void dfs2(int u, int p, i64 car = 0) {
    ans[u] = dp[0] + car;
    for (auto [v, w] : e[u]) {
        if (v != p) {
            dfs2(v, u, car + w - upedge[v]);
        }
    }
}
int main() {
    std::ios::sync_with_stdio(false);
    std::cin.tie(nullptr);
    std::cin >> n;
    i64 sum = 0;
    for (int i = 0; i < n - 1; i++) {
        int u, v, c, d;
        std::cin >> u >> v >> c >> d;
        u--;
        v--;
        e[u].emplace_back(v, c);
        e[v].emplace_back(u, d);
        sum += c + d;
    }
    dfs(0, 0);
    dfs2(0, 0);
    i64 res = *std::max_element(ans, ans + n);
    std::cout << sum - res << "\n";
    return 0;
}

Subtask #1
0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 3 ms 4940 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 247 ms 16232 KB Output is correct
3 Correct 267 ms 31688 KB Output is correct
4 Correct 234 ms 21308 KB Output is correct
5 Correct 232 ms 22612 KB Output is correct
6 Correct 239 ms 23888 KB Output is correct
7 Correct 200 ms 22720 KB Output is correct
8 Correct 283 ms 32036 KB Output is correct
9 Correct 154 ms 23172 KB Output is correct

Subtask #3
0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 3 ms 4940 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 3 ms 4940 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 247 ms 16232 KB Output is correct
3 Correct 267 ms 31688 KB Output is correct
4 Correct 234 ms 21308 KB Output is correct
5 Correct 232 ms 22612 KB Output is correct
6 Correct 239 ms 23888 KB Output is correct
7 Correct 200 ms 22720 KB Output is correct
8 Correct 283 ms 32036 KB Output is correct
9 Correct 154 ms 23172 KB Output is correct
10 Incorrect 3 ms 4940 KB Output isn't correct
11 Halted 0 ms 0 KB -

Subtask #6
0 / 44.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 3 ms 4940 KB Output isn't correct
2 Halted 0 ms 0 KB -