Submission #521472

#	Time	Username	Problem	Language	Result	Execution time	Memory
521472		errorgorn	Lampice (COCI21_lampice)	C++17	50 / 50	1 ms	320 KiB

Main

// Super Idol的笑容
//    都没你的甜
//  八月正午的阳光
//    都没你耀眼
//  热爱105°C的你
// 滴滴清纯的蒸馏水

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/rope>
using namespace std;
using namespace __gnu_pbds;
using namespace __gnu_cxx;
#define ll long long
#define ii pair<ll,ll>
#define iii pair<ii,ll>
#define fi first
#define se second
#define endl '\n'
#define debug(x) cout << #x << ": " << x << endl

#define pub push_back
#define pob pop_back
#define puf push_front
#define pof pop_front
#define lb lower_bound
#define ub upper_bound

#define rep(x,start,end) for(auto x=(start)-((start)>(end));x!=(end)-((start)>(end));((start)<(end)?x++:x--))
#define all(x) (x).begin(),(x).end()
#define sz(x) (int)(x).size()

#define indexed_set tree<ll,null_type,less<ll>,rb_tree_tag,tree_order_statistics_node_update>
//change less to less_equal for non distinct pbds, but erase will bug

mt19937 rng(chrono::system_clock::now().time_since_epoch().count());

int n,k;
int arr[55];

int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	cin.exceptions(ios::badbit | ios::failbit);
	
	cin>>n>>k;
	rep(x,0,n) cin>>arr[x];
	
	rep(x1,0,n) rep(x2,x1,n) if ((x2-x1+1)%k==0){
		int ped=(x2-x1+1)/k;
		
		bool can=true;
		rep(y,x1,x2-ped+1) if (arr[y]!=arr[y+ped]) can=false;
		
		if (can){
			cout<<ped<<endl;
			rep(y,x1,x1+ped) cout<<arr[y]<<" "; cout<<endl;
			return 0;
		}
	}
	cout<<"-1"<<endl;
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:30:26: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   30 | #define rep(x,start,end) for(auto x=(start)-((start)>(end));x!=(end)-((start)>(end));((start)<(end)?x++:x--))
      |                          ^~~
Main.cpp:59:4: note: in expansion of macro 'rep'
   59 |    rep(y,x1,x1+ped) cout<<arr[y]<<" "; cout<<endl;
      |    ^~~
Main.cpp:59:40: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   59 |    rep(y,x1,x1+ped) cout<<arr[y]<<" "; cout<<endl;
      |                                        ^~~~

• Subtask 1: 10 / 10
• Subtask 2: 15 / 15
• Subtask 3: 25 / 25