Submission #692657

#	Time	Username	Problem	Language	Result	Execution time	Memory
692657		zeroesandones	Lightning Rod (NOI18_lightningrod)	C++17	4 / 100	1349 ms	262144 KiB

Main

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

typedef long long ll;
typedef long double ld;
typedef vector<ll> vi;
typedef pair<ll, ll> pi;

#define FOR(i, j, k) for (ll i = j; i < (ll) k; ++i)
#define FORD(i, j, k) for (ll i = j; i >= (ll) k; --i)
#define nl "\n"
#define sp " "

#define all(x) (x).begin(), (x).end()
#define sc second
#define fr first
#define pb emplace_back

void solve()
{
    ll n;
    cin >> n;

    ll x[n], y[n];
    FOR(i, 0, n) {
        cin >> x[i] >> y[i];
    }

    if(y[0] < y[1]) {
        swap(y[0], y[1]);
        swap(x[0], x[1]);
    }

    ll cnt = 1;
    FOR(i, 1, n) {
        if(x[i] != x[i - 1])
            ++cnt;
    }

    cout << cnt << nl;
}

signed main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    ll t = 1;
    // cin >> t;
    while (t--)
    {
        solve();
    }
}

• Subtask 1: 4 / 4
• Subtask 2: 0 / 7
• Subtask 3: 0 / 12
• Subtask 4: 0 / 21
• Subtask 5: 0 / 26
• Subtask 6: 0 / 10
• Subtask 7: 0 / 20