Submission #246216

#	Time	Username	Problem	Language	Result	Execution time	Memory
246216		SamAnd	Lightning Rod (NOI18_lightningrod)	C++17	80 / 100	2073 ms	76300 KiB

Main

#include <bits/stdc++.h>
using namespace std;
#define m_p make_pair
#define all(x) (x).begin(),(x).end()
#define sz(x) ((int)(x).size())
#define fi first
#define se second
typedef long long ll;
mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());
mt19937 rnf(2106);
const int N = 10000007;

int ka()
{
    int x = 0;
    while (1)
    {
        char y = getchar();
        if ('0' <= y && y <= '9')
            x = (x * 10) + (y - '0');
        else
            return x;
    }
}

int m;
int xx[N], yy[N];

void solv()
{
    int nn = ka();
    while (nn--)
    {
        int x, y;
        x = ka();
        y = ka();
        while (m && x - xx[m - 1] <= y - yy[m - 1])
            m--;
        if (!m || !(x - xx[m - 1] <= yy[m - 1] - y))
        {
            xx[m] = x;
            yy[m] = y;
            m++;
        }
    }
    printf("%d\n", m);
}

int main()
{
    #ifdef SOMETHING
    freopen("input.txt", "r", stdin);
    //freopen("output.txt", "w", stdout);
    #endif // SOMETHING
    //ios_base::sync_with_stdio(false), cin.tie(0);
    solv();
    return 0;
}

//while ((double)clock() / CLOCKS_PER_SEC <= 0.9){}

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