답안 #998400

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
998400 2024-06-13T23:42:12 Z Wael 봉쇄 시간 (IOI23_closing) C++17
컴파일 오류
0 ms 0 KB
#include "closing.h"
#include "grader.cpp"
#include <bits/stdc++.h>
using namespace std;
using i64 = long long;

int max_score(int n, int x, int y, long long k, vector<int> U, vector<int> V, vector<int> W) {
    vector<vector<pair<int, int>>> adj(n);
    for (int i = 0; i < n - 1; ++i) {
        adj[U[i]].push_back({V[i], W[i]});
        adj[V[i]].push_back({U[i], W[i]});
    }

    vector<vector<i64>> dis(n, vector<i64>(2, 0));
    function<void(int, int, int)> dfs = [&](int u, int p, int t) {
        for (auto [v, w] : adj[u]) {
            if (v == p) continue;
            dis[v][t] = dis[u][t] + w;
            dfs(v, u, t);
        }
    };
    dfs(x, -1, 0);
    dfs(y, -1, 1);

    int ans = 2;
    vector<vector<int>> used(n, vector<int>(2, 0));
    used[x][0] = 1;
    used[y][1] = 1;
    for (int c = 1; c <= 2 * n; ++c) {
        i64 mn = 1e18;
        int from, type;
        for (int u = 0; u < n; ++u) {
            for (auto [v, w] : adj[u]) {
                for (int t = 0; t <= 1; ++t) {
                    if (used[v][t] && used[u][t] == 0) {
                        if (mn > dis[u][t]) {
                            from = u;
                            type = t;
                        }
                        mn = min(mn, dis[u][t]);
                    }
                }
            }
        }
        if (mn <= k) {
            k -= mn;
            used[from][type] = 1;
            dis[from][!type] -= mn;
            ++ans;
        } else {
            break;
        }
    }

    return ans;
}

Compilation message

closing.cpp: In function 'int max_score(int, int, int, long long int, std::vector<int>, std::vector<int>, std::vector<int>)':
closing.cpp:47:28: warning: 'type' may be used uninitialized in this function [-Wmaybe-uninitialized]
   47 |             used[from][type] = 1;
      |                            ^
closing.cpp:47:22: warning: 'from' may be used uninitialized in this function [-Wmaybe-uninitialized]
   47 |             used[from][type] = 1;
      |                      ^
/usr/bin/ld: /tmp/ccg75YrO.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccMbkRNQ.o:closing.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status