Submission #906053

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
906053	2024-01-13 12:21:00	Mathias	The Xana coup (BOI21_xanadu)	C++14	100 / 100	66 ms	20564 KiB

xanadu

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#include <bits/stdc++.h>
using namespace std;
#define ll long long
const int MAXN = 1e5+7;
const long long INF = 1e9+7;
long long dp[MAXN][3][3];
bool t[MAXN], visited[MAXN];
vector<long long> g[MAXN];
long long n,a,b,c,d;
void DFS(int x,int f){
  visited[x]=1;
  if(t[x]){
    dp[x][1][0]=1;
    dp[x][0][1]=0;
  }
  else{
    dp[x][1][1]=1;
    dp[x][0][0]=0;
  }
  for(int i=0;i<g[x].size();i++){
    if(visited[g[x][i]]==1) continue;
    int s=g[x][i];
    DFS(s,x);
  }
  for(int i=0;i<g[x].size();i++){
    int s=g[x][i];
    if(s==f) continue;
    a=dp[x][0][0], b=dp[x][0][1], c=dp[x][1][0], d=dp[x][1][1];
        dp[x][0][0]=min(a+dp[s][0][0], b+dp[s][1][0]);
        dp[x][0][1]=min(b+dp[s][0][0], a+dp[s][1][0]);
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

xanadu.cpp: In function 'void DFS(int, int)':
xanadu.cpp:20:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |  for(int i=0;i<g[x].size();i++){
      |              ~^~~~~~~~~~~~
xanadu.cpp:25:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |  for(int i=0;i<g[x].size();i++){
      |              ~^~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 15 / 15
• Subtask 3: 10 / 10
• Subtask 4: 40 / 40
• Subtask 5: 30 / 30