Submission #209424

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
209424	2020-03-14 07:33:02	model_code	Solar Storm (NOI20_solarstorm)	C++17	100 / 100	527 ms	148288 KiB

SolarStorm

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#include <bits/stdc++.h>
using namespace std;
const int N = 1e6 + 5;
#define ll long long
ll A[N], prefix[N];
int V[N];
int nxt[N], before[N], parent[N];
vector<int> adj[N];
int n, s, ans_start;
ll ans = 0;
vector<int> LOL;
void dfs(int u) {
  LOL.push_back(u);
  if(u != n) {
    int l = before[u];
    int r = nxt[LOL[max(0, (int)LOL.size() - s)]] - 1;
    ll candidate = prefix[r] - (l == -1 ? 0 : prefix[l]);
    //cout<<"DBG --> "<<u<<" : "<<l<<" "<<r<<" : "<<candidate<<endl;
    if(candidate > ans) {
      ans = candidate;
      ans_start = u;
    }
  }
  for(auto v : adj[u]) {
    dfs(v);
 
 
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• Subtask 7: 30 / 30