#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define rep(a, b) for(ll a = 0; a < (b); ++a)
#define lg(a) (!a?0:64-__builtin_clzll(a))
#define st first
#define nd second
#define pb push_back
const ll LIM=1e3+7;
ll T[LIM];
int main() {
ios_base::sync_with_stdio(0); cin.tie(0);
ll n, l=1;
cin >> n;
rep(i, n) cin >> T[i];
vector<pair<ll,ll>>ans;
for(int i=20; i; --i) {
int p=0;
rep(j, n-l) {
if(lg(T[j])==i) {
p=1;
if(lg(T[j])!=lg(T[j+1])) {
ans.pb({j+1, j});
T[j+1]^=T[j];
}
ans.pb({j, j+1});
T[j]^=T[j+1];
}
}
l+=p;
}
cout << ans.size() << '\n';
for(auto i : ans) cout << i.st+1 << " " << i.nd+1 << '\n';
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
1 ms |
364 KB |
Not sorted |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
1 ms |
364 KB |
Not sorted |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
1 ms |
364 KB |
Not sorted |
2 |
Halted |
0 ms |
0 KB |
- |