Submission #319291

#	Time	Username	Problem	Language	Result	Execution time	Memory
319291		mohamedsobhi777	Worst Reporter 3 (JOI18_worst_reporter3)	C++14	100 / 100	657 ms	27492 KiB

worst_reporter3

#include <bits/stdc++.h>

#pragma GCC optimize("-Ofast")
//#pragma GCC optimize("trapv")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,sse4.2,popcnt,abm,mmx,avx2,tune=native")
#pragma GCC optimize("-ffast-math")
#pragma GCC optimize("-funroll-loops")

#define I inline void
#define S struct
#define vi vector<int>
#define vii vector<pair<int, int>>
#define pii pair<int, int>
#define pll pair<ll, ll>

using namespace std;
using ll = long long;
using ld = long double;

const int N = 5e5 + 7, mod = 1e9 + 7;
const ll inf = 2e18;

// How interesting!

int n, m;
int a[N];
ll per[N];

int main()
{
        ios_base::sync_with_stdio(0);
        cin.tie(0);
        //freopen("in.in", "r", stdin);
        cin >> n >> m;

        for (int i = 0; i < n; ++i)
                cin >> a[i];
        per[0] = a[0];
        for (int i = 1; i < n; ++i)
                per[i] = ceil(1.0 * a[i] / per[i - 1]) * per[i - 1];

        for (int i = 0; i < m; ++i)
        {

                int x, y, z;
                cin >> x >> y >> z;
                int l = 0, r = n - 1;
                int ans1 = -1, ans2 = -1;
                int k = 0;
                while (l <= r)
                {
                        int mid = (l + r) >> 1;
                        int pos = -(mid + 1);
                        int d = x / per[mid];
                        pos += d * per[mid];
                        if (pos >= y)
                        {
                                ans1 = mid;
                                l = mid + 1;
                        }
                        else
                                r = mid - 1;
                }
                l = 0, r = ans1;
                while (l <= r)
                {
                        int mid = (l + r) >> 1;
                        int pos = -(mid + 1);
                        int d = x / per[mid];
                        pos += d * per[mid];
                        if (pos <= z)
                        {
                                ans2 = mid;
                                r = mid - 1;
                        }
                        else
                                l = mid + 1;
                }
                int ans = 0 ; 
                if(ans1== -1 || ans2 == -1);else ans = ans1 - ans2 + 1; 
                cout << ans + (x >= y && x <= z) << "\n";
        }
        return 0;
}

Compilation message (stderr)

worst_reporter3.cpp: In function 'int main()':
worst_reporter3.cpp:49:21: warning: unused variable 'k' [-Wunused-variable]
   49 |                 int k = 0;
      |                     ^

• Subtask 1: 7 / 7
• Subtask 2: 12 / 12
• Subtask 3: 81 / 81