Submission #72403157

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int,int> pp;
typedef pair<ll,ll> pll;
void cppio(){ ios_base::sync_with_stdio(0); cin.tie(0); }
template<typename T,typename U>
istream& operator>>(istream& i, pair<T,U>& p) { i >> p.first >> p.second; return i; }
#define all(x) (x).begin(),(x).end()
#define pb push_back
#define eb emplace_back
#define x first
#define y second
#define rep(i,n) for(int i = 0; i < (n); ++i)
#define rrep(i,n) for(int i = 1; i <= (n); ++i)
#define sz(x) (int)(x).size()
#define XY(t) t.x, t.y

void Work(int tci) {
    int c, x; cin >> c >> x;
    
    ll ans = -1;
    auto f = [&](ll n) {
        if (n) if ((n^c)%n == x) ans = n;
    };

    f(c^x);

    if ((c-x) >= 0 && (c-x)%2 == 0 && (((c-x)/2) & (~c)) == 0)
        f((c-x)/2 + (1ll<<40));

    cout << ans << '\n';
}

int main()
{
    cppio();
    int tc; cin >> tc; rrep(tci, tc) Work(tci);
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function 'void Work(int)':
./Main.cpp:19:15: warning: unused parameter 'tci' [-Wunused-parameter]
   19 | void Work(int tci) {
      |           ~~~~^~~

Judge Result