Submission #706725

#	Time	Username	Problem	Language	Result	Execution time	Memory
706725		Username4132	Hiperkocka (COCI21_hiperkocka)	C++14	110 / 110	54 ms	3608 KiB

Main

#include<iostream>
#include<vector>
using namespace std;
#define forn(i, n) for(int i=0; i<(int)n; ++i)
#define PB push_back

const int MAXN = 18;
int n, cnt, ret[MAXN];
vector<int> g[MAXN];

void dfs(int v, int p, int cur){
    ++cnt, ret[v]=cur;
    for(int to:g[v]){
        if(to==p) continue;
        dfs(to, v, cur^(1<<cnt));
    }
}

int main(){
    scanf("%d", &n);
    forn(i, n){
        int a, b; scanf("%d %d", &a, &b);
        g[a].PB(b), g[b].PB(a);
    }
    printf("%d\n", 1<<(n-1));
    forn(i, 1<<n) if(!(i && (__builtin_popcount(i)&1))){
        cnt=-1, dfs(0, 0, i);
        forn(j, n+1) printf("%d ", ret[j]);
        printf("\n");
    }
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:20:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
Main.cpp:22:24: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |         int a, b; scanf("%d %d", &a, &b);
      |                   ~~~~~^~~~~~~~~~~~~~~~~

• Subtask 1: 110 / 110