Submission #965335

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
965335	2024-04-18T10:50:56 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', stdin);
        freopen("harbingers.out", 'w', 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

harbingers.cpp: In function 'int main()':
harbingers.cpp:35:34: error: invalid conversion from 'char' to 'const char*' [-fpermissive]
   35 |         freopen("harbingers.in", 'r', stdin);
      |                                  ^~~
      |                                  |
      |                                  char
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:
/usr/include/stdio.h:253:32: note:   initializing argument 2 of 'FILE* freopen(const char*, const char*, FILE*)'
  253 |         const char *__restrict __modes,
      |         ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~
harbingers.cpp:36:35: error: invalid conversion from 'char' to 'const char*' [-fpermissive]
   36 |         freopen("harbingers.out", 'w', stdout);
      |                                   ^~~
      |                                   |
      |                                   char
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:
/usr/include/stdio.h:253:32: note:   initializing argument 2 of 'FILE* freopen(const char*, const char*, FILE*)'
  253 |         const char *__restrict __modes,
      |         ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~
harbingers.cpp:35:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   35 |         freopen("harbingers.in", 'r', stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
harbingers.cpp:36:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   36 |         freopen("harbingers.out", 'w', stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~