Submission #1164929

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1164929	2025-03-10 14:04:17	fryingduc	Valley (BOI19_valley)	C++20	100 / 100	169 ms	37236 KiB

valley

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#include "bits/stdc++.h"
using namespace std;
#ifdef duc_debug
#include "bits/debug.h"
#else
#define debug(...)
#endif
const int maxn = 1e5 + 5;
const int LG = 18;
int n, s, q, e;
int eu[maxn], ev[maxn], ew[maxn];
vector<pair<int, int>> g[maxn];
bool spec[maxn];
int up[maxn][LG + 1], h[maxn];
long long st[maxn][LG + 1];
long long dep[maxn];
long long f[maxn];
void pre_dfs(int u, int prev) {
  f[u] = 1e18;
  if (spec[u]) f[u] = 0;
  for (auto [v, w] : g[u]) {
    if (v == prev) continue;
    up[v][0] = u;
    for (int i = 1; i <= LG; ++i) {
      up[v][i] = up[up[v][i - 1]][i - 1];
    }
 
 
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• Subtask 1: 9 / 9
• Subtask 2: 27 / 27
• Subtask 3: 23 / 23
• Subtask 4: 41 / 41