Submission #736432

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
736432	2023-05-05 15:59:22	He_Huanglu	Inside information (BOI21_servers)	C++17	100 / 100	624 ms	35844 KiB

servers

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#include <bits/stdc++.h>
#define ii pair<int, int>
using namespace std;
const int N = 12e4 + 5, S = 17;
int n, nq, f[N], anc[N], sz[N], ans[2 * N], dis[N], par[N][S], tang[N], giam[N], bit[2 * N];
bool block[N], inc[N], red[N];
vector <ii> ke[N], cur;
vector <int> ques[N];
struct sieungu {
    int fi, se, th;
}; vector <sieungu> dull;
void dfs(int u, int pre, int p) {
    for(auto [v, w] : ke[u]) if(!block[v] && v != pre) {
        f[v] = w;
        if(!p) {
            anc[v] = v;
            inc[v] = red[v] = 1;
            cur.push_back({v, w});
        }
        else {
            inc[v] = (inc[u] && f[v] > f[u]);
            red[v] = (red[u] && f[v] < f[u]);
            anc[v] = anc[u];
        }
        if(red[v]) {
            for(int i : ques[v]) if(f[anc[v]] < i) ans[i]++;
        }
        dfs(v, u, anc[v]);
 
 
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Compilation message (stderr)

servers.cpp:124:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
  124 | main () {
      | ^~~~
servers.cpp: In function 'int main()':
servers.cpp:127:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  127 |         freopen("task.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
servers.cpp:128:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  128 |         freopen("wa.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 2.5 / 2.5
• Subtask 2: 2.5 / 2.5
• Subtask 3: 2.5 / 2.5
• Subtask 4: 2.5 / 2.5
• Subtask 5: 5 / 5
• Subtask 6: 5 / 5
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 12.5 / 12.5
• Subtask 10: 12.5 / 12.5
• Subtask 11: 17.5 / 17.5
• Subtask 12: 17.5 / 17.5