Submission #1056369

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1056369	2024-08-13 09:03:07	Piokemon	The Xana coup (BOI21_xanadu)	C++17	100 / 100	35 ms	17780 KiB

xanadu

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#include <bits/stdc++.h>
using namespace std;
typedef long long int ll;
constexpr int N = 100'000;
int a[N+9];
vector<int> graf[N+9];
ll dp[N+9][2][2];
ll dp2[N+9][2][2];
void dfs(int v, int par){
    if (graf[v].size()==1 && v!=1){
        dp[v][a[v]][0]=0;
        dp[v][1-a[v]][1]=1;
        dp[v][a[v]][1]=1e9;
        dp[v][1-a[v]][0]=1e9;
        return;
    }
    int nr=1;
    dp2[0][0][0]=0; dp2[0][0][1]=1e9;
    dp2[0][1][0]=0; dp2[0][1][1]=1e9;
    ll s0=0,s1=0;
    for (int x:graf[v]){
        if (x==par)continue;
        dfs(x,v);
    }
    for (int x:graf[v]){
        if (x==par)continue;
        for (int z=0;z<2;z++){
            dp2[nr][z][0]=min(dp2[nr-1][z][0]+dp[x][z][0],dp2[nr-1][z][1]+dp[x][z][1]);
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

xanadu.cpp: In function 'void dfs(int, int)':
xanadu.cpp:22:8: warning: unused variable 's0' [-Wunused-variable]
   22 |     ll s0=0,s1=0;
      |        ^~
xanadu.cpp:22:13: warning: unused variable 's1' [-Wunused-variable]
   22 |     ll s0=0,s1=0;
      |             ^~

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