Submission #965334

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
965334	2024-04-18T10:50:01 Z	MisterReaper	Harbingers (CEOI09_harbingers)	C++17	Compilation error	0 ms	0 KB

harbingers

#include <bits/stdc++.h>
using i64 = long long;

constexpr int maxN = 1E5 + 5;
constexpr i64 INF = 1E18;

int N;
std::vector<std::pair<int, int>> adj[maxN];
int S[maxN], V[maxN], par[maxN], w[maxN];
i64 dp[maxN];

void dfs(int v) {
    i64 d = 0;
    int u = v;
    while(u != 1) {
        d += w[u];
        u = par[u];
        dp[v] = std::min(dp[v], dp[u] + 1LL * d * V[v] + S[v]);
    }
    for(auto [u, w] : adj[v]) {
        if(u == par[v]) {
            continue;
        }
        ::w[u] = w;
        par[u] = v;
        dfs(u);
    }
}

signed main() {
    std::ios::sync_with_stdio(false);
    std::cin.tie(nullptr);

    #ifndef LOCAL
        freopen("harbingers.in", 'r', std::stdin);
        freopen("harbingers.out", 'w', std::stdout);
    #endif

    std::cin >> N;
    for(int i = 1; i <= N - 1; i++) {
        int A, B, W;
        std::cin >> A >> B >> W;
        adj[A].emplace_back(B, W);
        adj[B].emplace_back(A, W);
    }

    for(int i = 2; i <= N; i++) {
        std::cin >> S[i] >> V[i];
    }

    std::fill_n(&dp[1], N, INF);
    dp[1] = 0;
    par[1] = 1;
    dfs(1);

    for(int i = 2; i <= N; i++) {
        std::cout << dp[i] << " \n"[i == N];
    }

    return 0;
}

Compilation message

In file included from /usr/include/c++/10/cstdio:42,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:46,
                 from harbingers.cpp:1:
harbingers.cpp: In function 'int main()':
harbingers.cpp:35:44: error: 'stdin' is not a member of 'std'; did you mean 'sin'?
   35 |         freopen("harbingers.in", 'r', std::stdin);
      |                                            ^~~~~
harbingers.cpp:36:45: error: 'stdout' is not a member of 'std'; did you mean 'stdout'?
   36 |         freopen("harbingers.out", 'w', std::stdout);
      |                                             ^~~~~~
/usr/include/stdio.h:138:14: note: 'stdout' declared here
  138 | extern FILE *stdout;  /* Standard output stream.  */
      |              ^~~~~~