Submission #1219473

#	Time	Username	Problem	Language	Result	Execution time	Memory
1219473		12345678	Portal (BOI24_portal)	C++20	10 / 100	22 ms	3764 KiB

Main

#include <bits/stdc++.h>

using namespace std;

#define ll long long

const int nx=1e5+5;

ll n, x[nx], y[nx], gx, gy;
vector<ll> vx, vy;

struct myvector
{
    ll x, y;
    myvector(ll x, ll y): x(x), y(y){}
};

ll cross(myvector a, myvector b)
{
    return a.x*b.y-a.y*b.x;
}

int main()
{
    cin.tie(NULL)->sync_with_stdio(false);
    cin>>n;
    for (int i=1; i<=n; i++) cin>>x[i]>>y[i], vx.push_back(x[i]), vy.push_back(y[i]);
    sort(vx.begin(), vx.end());
    vx.erase(unique(vx.begin(), vx.end()), vx.end());
    sort(vy.begin(), vy.end());
    vy.erase(unique(vy.begin(), vy.end()), vy.end());
    if (vx.size()==1||vy.size()==1) return cout<<-1, 0;
    for (int i=1; i<vx.size(); i++) gx=__gcd(gx, vx[i]-vx[i-1]);
    for (int i=1; i<vy.size(); i++) gy=__gcd(gy, vy[i]-vy[i-1]);
    cout<<gx*gy;
}

• Subtask 1: 0 / 1
• Subtask 2: 0 / 10
• Subtask 3: 10 / 10
• Subtask 4: 0 / 29
• Subtask 5: 0 / 15
• Subtask 6: 0 / 35