Submission #109991

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
109991	2019-05-08 14:25:54	IOrtroiii	Construction of Highway (JOI18_construction)	C++14	100 / 100	673 ms	104508 KiB

construction

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#include <bits/stdc++.h>
using namespace std;
const int N = 100100;
struct Data {
   int from, to, color;
   Data(int from = 0,int to = 0,int color = 0) : from(from), to(to), color(color) {}
};
int n;
vector<int> g[N];
int from[N], to[N], color[N];
int child[N], nxt[N], root[N];
int par[N], pos[N], ft[N];
deque<Data> dq[N];
void add(int p,int x) { for (; p <= n; p += p & -p) ft[p] += x; }
int get(int p) { int ans = 0; for (; p > 0; p -= p & -p) ans += ft[p]; return ans; }
void dfs(int u) {
   child[u] = 1;
   for (int v : g[u]) {
      par[v] = u;
      dfs(v);
      child[u] += child[v];
   }
}
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

construction.cpp: In function 'void get_hld(int)':
construction.cpp:54:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
       while (ptr < dq[u].size() && dq[u][ptr].from <= p) ptr++;
              ~~~~^~~~~~~~~~~~~~
construction.cpp: In function 'int main()':
construction.cpp:84:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d", &n);
    ~~~~~^~~~~~~~~~
construction.cpp:86:12: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
       scanf("%d", color + i);
       ~~~~~^~~~~~~~~~~~~~~~~
construction.cpp:96:12: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
       scanf("%d %d", from + i, to + i);
       ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 7 / 7
• Subtask 2: 9 / 9
• Subtask 3: 84 / 84