제출 #304921

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
304921		EMEJ	JOIRIS (JOI16_joiris)	C++11	0 / 100	1 ms	512 KiB

joiris

#include <bits/stdc++.h>

#define int long long
#define F first
#define S second
#define pb push_back
#define pii pair <int,int>
#define all(x) x.begin(),x.end()
#define SZ(x) (int)x.size()

using namespace std;

const int N=4;
int a[N],b[N];
vector <pii> ans,prt[2]; 

int32_t main(){
	ios::sync_with_stdio(0);cin.tie(0);
	int n,k;
	cin>>n>>k;
	for(int i=1;i<=n;i++){
		 cin>>a[i];
		 while(a[i]<N){
			a[i]+=2;
			ans.pb({1,i});
		 }
	}
	int j=1,res0=1,res1=1;
	for(int i=1;i<=n;i=j){
		while(j<=n && a[i]%2==a[j]%2) j++;
		for(int k=i;k<j;k+=2){
			prt[a[i]%2].pb({2,k});
		}
		if((j-i)%2){
			if(a[i]%2) res1=0;
			else res0=0;
		}
	}
	if(res0){
		cout<<SZ(ans)+SZ(prt[0])<<endl;
		for(pii p:ans) cout<<p.F<<" "<<p.S<<endl;
		for(pii p:prt[0]) cout<<p.F<<" "<<p.S<<endl;
	}
	else if(res1){
		cout<<SZ(ans)+n-SZ(prt[1])<<endl;
		for(pii p:ans) cout<<p.F<<" "<<p.S<<endl;
		for(int i=1;i<=n;i++) if(a[i]%2==0) cout<<1<<" "<<i<<endl;
		for(pii p:prt[1]) cout<<p.F<<" "<<p.S<<endl;
	}
	else cout<<-1<<endl;
	return 0;
}

• Subtask 1: 0 / 15
• Subtask 2: 0 / 15
• Subtask 3: 0 / 15
• Subtask 4: 0 / 55