Submission #783344

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
783344	2023-07-14 21:12:33	fuad27	Two Currencies (JOI23_currencies)	C++17	100 / 100	978 ms	36920 KiB

currencies

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#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
#include<bits/stdc++.h>
using namespace std;
const int N=100'010,L=20;
vector<pair<int,int>> g[N];
int up[N][L];
int tin[N], tout[N],depth[N];
int tinn[N];
int tim=1;
void dfs(int at, int p) {
  up[at][0]=p;
  for(int i = 1;i<L;i++) {
    up[at][i]=up[up[at][i-1]][i-1];
  }
  for(auto to:g[at]) {
    if(to.first==p)continue;
    tinn[to.first]=tim;
    tin[to.second]=tim++;
    depth[to.first]=depth[at]+1;
    dfs(to.first,at);
    tout[to.second]=tim++;
  }
}
int lca(int a, int b) {
  if(depth[a]<depth[b])swap(a,b);
  int k=depth[a]-depth[b];
  for(int i = L-1;i>=0;i--) {
    if(k&(1<<i))a=up[a][i];
  }
 
 
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Compilation message (stderr)

currencies.cpp: In function 'int main()':
currencies.cpp:111:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  111 |   for(int i = 0;i<queries.size();i++) {
      |                 ~^~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 28 / 28
• Subtask 3: 30 / 30
• Subtask 4: 32 / 32