Submission #211246

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
211246	2020-03-19 18:09:33	socho	Solar Storm (NOI20_solarstorm)	C++14	100 / 100	1494 ms	246120 KiB

SolarStorm

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#include "bits/stdc++.h"
using namespace std;
const int MXN = 1000005, MXK = 22;
long long n, s, k;
long long pf[MXN];
vector<int> subs[MXN];
int par[MXN][MXK];
int depth[MXN];
void dfs_decomp(int node, int last, int dep) {
  depth[node] = dep;
  par[node][0] = last;
  for (int i=1; i<MXK; i++) {
    int ab = par[node][i-1];
    if (ab != -1) {
      par[node][i] = par[ab][i-1];
    }
  }
  for (int i=0; i<subs[node].size(); i++) {
    if (subs[node][i] == last) continue;
    dfs_decomp(subs[node][i], node, dep+1);
  }
}
int kth_parent(int n, int k) {
  k = min(k, depth[n]);
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

SolarStorm.cpp: In function 'void dfs_decomp(int, int, int)':
SolarStorm.cpp:23:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i=0; i<subs[node].size(); i++) {
                ~^~~~~~~~~~~~~~~~~~
SolarStorm.cpp: In function 'int main()':
SolarStorm.cpp:115:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i=0; i<need.size(); i++) {
                ~^~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 7 / 7
• Subtask 3: 11 / 11
• Subtask 4: 8 / 8
• Subtask 5: 18 / 18
• Subtask 6: 16 / 16
• Subtask 7: 30 / 30