Submission #52319521

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;

#define rep(i, a, b) for(int i = a; i < (b); ++i)
#define all(x) begin(x), end(x)
#define sz(x) (int)(x).size()
typedef long long ll;
typedef pair<ll, ll> pii;
typedef vector<int> vi;
#define pb push_back

const inline ll lsb(ll x) {
    return x & -x;
}

int main() {
	cin.tie(0)->sync_with_stdio(0);

    ll l, r; cin >> l >> r;

    vector<pair<ll, ll>> ans1, ans2;
    while (l > 0 && l + lsb(l) <= r) {
        ans1.pb({l, l + lsb(l)});
        l += lsb(l);
    }
    while (r > 0 && r - lsb(r) >= l) {
        ans2.pb({r - lsb(r), r});
        r -= lsb(r);
    }
    reverse(all(ans2));
    
    cout << sz(ans1) + sz(ans2) << '\n';
    for (auto [a, b] : ans1) {
        cout << a << ' ' << b << '\n';
    }
    for (auto [a, b] : ans2) {
        cout << a << ' ' << b << '\n';
    }
}

Submission Info

Compile Error

Main.cpp:12:1: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
   12 | const inline ll lsb(ll x) {
      | ^~~~~

Judge Result