This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include<bits/stdc++.h>
using namespace std;
int main () {
int n, s;
cin >> n >> s;
int a[n];
for(int i = 0;i<n;i++)cin >> a[i];
if(s==2) {
vector<pair<int,int>> op;
for(int i = 19;i>=0;i--) {
for(int j = 1;j<n;j++) {
if((a[j]&(1<<i))==0 and (a[j-1]&(1<<i))!=0) {
a[j]^=a[j-1];
op.push_back({j,j-1});
}
if((a[j-1]&(1<<i))!=0) {
if((a[j-1]^a[j])<a[j-1]) {
a[j-1]^=a[j];
op.push_back({j-1,j});
}
}
}
}
cout << op.size() << "\n";
for(auto i:op) {
cout << i.first << " " << i.second << "\n";
}
}
}
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |