oj.uz

Submission #815766

# Submission time Handle Problem Language Result Execution time Memory
815766 2023-08-08T21:38:29 Z ThylOne Xor Sort (eJOI20_xorsort) C++14
65 / 100
 77 ms 1244 KB 
#include<bits/stdc++.h>

using namespace std;
vector<pair<int,int>> ans;
void swapA(int i,int j){
	ans.push_back(make_pair(j,i));
	ans.push_back(make_pair(i,j));
	ans.push_back(make_pair(j,i));

}


void binaryPrint(int n, int log=6){
	for(int i=log-1;i>=0;i--){
		if(n&1){
			cout<<"1";
		}else{
			cout<<"0";
		}
		n>>=1;
	}
	cout<<endl;
}
#define debug for(int i = 0 ; i < n ; i++)binaryPrint(nums[i]);cout<<endl;
int main(){
	int n,s;cin>>n>>s;
	vector<int> nums(n);
	for(int i = 0 ; i <n;i++){
		cin>>nums[i];
	}
	if(s==1){
		
		for(int pos=0;pos<n;pos++){
			for(int i=0;i<n-1;i++){
				if(nums[i]>nums[i+1]){
					swap(nums[i],nums[i+1]);
					swapA(i,i+1);
				}
			}
		}
		
		}else{
			//s==2
			int last=n;
			
			for(int BIT=19;BIT>=0;BIT--){
				int ID=-1;
				for(int i=0;i<last;i++){
					if((nums[i]>>BIT)&1){
						ID=i;
						break;
					}
				}
				if(ID==-1)continue;
				for(int i=ID;i<last-1;i++){
					if(!((nums[i+1]>>BIT)&1)){
						ans.push_back(make_pair(i+1,i));
						nums[i+1]=nums[i+1]^nums[i];
					}
				}
				for(int i=ID;i>0;i--){
					if(!((nums[i-1]>>BIT)&1)){
						ans.push_back(make_pair(i-1,i));
						nums[i-1]=nums[i-1]^nums[i];
					}
				}
				
				//On détruit tout les bits sauf 1
				for(int i=1;i<last;i++){
					// ans i i+1
					ans.push_back(make_pair(i-1,i));
					nums[i-1]=nums[i-1]^nums[i];
				}
				last--;
				
			}
			
		}
		cout<<ans.size()<<endl;
		for(auto&p:ans){
			cout<<p.first+1<<' '<<p.second+1<<endl;
		}
		
	
	return 0;
}

Subtask #1
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 2 ms 340 KB Output is correct
4 Correct 16 ms 596 KB Output is correct
5 Correct 19 ms 688 KB Output is correct
6 Correct 18 ms 680 KB Output is correct
7 Correct 18 ms 688 KB Output is correct
8 Correct 18 ms 596 KB Output is correct
9 Correct 20 ms 628 KB Output is correct
10 Correct 25 ms 644 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 42 ms 988 KB Output is correct
13 Correct 46 ms 876 KB Output is correct
14 Correct 35 ms 848 KB Output is correct
15 Correct 35 ms 852 KB Output is correct

Subtask #2
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 2 ms 340 KB Output is correct
4 Correct 16 ms 596 KB Output is correct
5 Correct 19 ms 688 KB Output is correct
6 Correct 18 ms 680 KB Output is correct
7 Correct 18 ms 688 KB Output is correct
8 Correct 18 ms 596 KB Output is correct
9 Correct 20 ms 628 KB Output is correct
10 Correct 25 ms 644 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 42 ms 988 KB Output is correct
13 Correct 46 ms 876 KB Output is correct
14 Correct 35 ms 848 KB Output is correct
15 Correct 35 ms 852 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 19 ms 688 KB Output is correct
18 Correct 34 ms 760 KB Output is correct
19 Correct 39 ms 856 KB Output is correct
20 Correct 31 ms 764 KB Output is correct
21 Correct 43 ms 840 KB Output is correct
22 Correct 33 ms 816 KB Output is correct
23 Correct 33 ms 836 KB Output is correct
24 Correct 31 ms 840 KB Output is correct
25 Correct 31 ms 748 KB Output is correct
26 Incorrect 77 ms 1244 KB Integer 59568 violates the range [0, 40000]
27 Halted 0 ms 0 KB -

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 2 ms 304 KB Output is correct
4 Correct 6 ms 340 KB Output is correct
5 Correct 32 ms 828 KB Output is correct
6 Correct 36 ms 904 KB Output is correct
7 Correct 32 ms 892 KB Output is correct
8 Correct 32 ms 860 KB Output is correct
9 Correct 39 ms 804 KB Output is correct
10 Correct 31 ms 840 KB Output is correct
11 Correct 35 ms 904 KB Output is correct
12 Correct 42 ms 912 KB Output is correct
13 Correct 35 ms 840 KB Output is correct
14 Correct 36 ms 852 KB Output is correct
15 Correct 55 ms 980 KB Output is correct