Submission #497785

#	Time	Username	Problem	Language	Result	Execution time	Memory
497785		inksamurai	Sob (COCI19_sob)	C++17	0 / 110	1 ms	460 KiB

sob

#include <bits/stdc++.h>
#define fi first
#define se second
#define pb push_back
#define sz(a) (int)a.size()
#define all(a) a.begin(),a.end()
#define rep(i,n) for(int i=0;i<n;i++)
#define crep(i,x,n) for(int i=x;i<n;i++)
#define drep(i,n) for(int i=n-1;i>=0;i--)
#define vec(...) vector<__VA_ARGS__>
#define _32bB6rn ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0)
using namespace std;
typedef long long ll;
typedef long double ld;
using pii=pair<int,int>;
using vi=vector<int>;

bool ispo2(int n){
	while(n%2==0){
		n/=2;
	}
	return n==1;
}

int main(){
_32bB6rn;
	int n,m;
	cin>>n>>m;
	assert(ispo2(n));
	int x=n-1;
	int j=-1;
	rep(i,n){
		int y=i+m;
		if((x&y)==x){
			j=i;
			break;
		}
	}
	vec(pii) pans;
	int oj=j;
	while(j>=0){
		pans.pb({x,j+m});
		j--;
		x--;
	}
	j=oj+1;
	while(j<n){
		pans.pb({x,j+m});
		x--;
		j++;
	}
	for(auto p : pans){
		cout<<p.fi<<" "<<p.se<<"\n";
	}
//	
	return 0;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 29
• Subtask 3: 0 / 39
• Subtask 4: 0 / 32