Submission #72881692

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Source Code Expand

#include <bits/stdc++.h>
#define endl '\n'
using namespace std;

long long t, n, ans, cur, f = 1, idx = 1, a[300010];

int main()
{
    cin >> n >> t;
    for (long long i = 1; i <= n; i++)
        cin >> a[i];
    while (cur < t)
    {
        if (f)
        {
            while (idx <= n && a[idx] < cur)
                idx++;
            if (idx <= n && a[idx] <= t)
            {
                ans += a[idx] - cur;
                cur = a[idx];
                f = false;
                idx++;
            }
            else
            {
                ans += t - cur;
                cur = t;
            }
        }
        else
        {
            if (cur + 100 >= t)
                break;
            else
            {
                cur = cur + 100;
                f = true;
            }
        }
    }
    cout << ans << endl;
    return 0;
}

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