Submission #627396

#	Time	Username	Problem	Language	Result	Execution time	Memory
627396		MilosMilutinovic	Worst Reporter 3 (JOI18_worst_reporter3)	C++14	100 / 100	684 ms	25060 KiB

worst_reporter3

#include <bits/stdc++.h>
#define rep(i, n) for(int i = 0; i < (int)(n); i ++)
#define rep1(i, n) for(int i = 1; i <= (int)(n); i ++)
#define MP make_pair

using namespace std;
typedef long long LL;
typedef pair<int, int> PII;

#define int long long

int n, q, d[500005];
int calc(int i, int T)
{
	int coeff = T / d[i];
	return coeff * d[i] - i - 1;
}
signed main()
{
	scanf("%lld%lld", &n, &q);
	rep(i, n) scanf("%lld", &d[i]);
	rep(i, n) {
		if(i == 0) continue;
		d[i] = d[i - 1] * ((d[i] + d[i - 1] - 1) / d[i - 1]);
	}
	while(q--) {
		int T, L, R;
		scanf("%lld%lld%lld", &T, &L, &R);
		int l = -1, r = -1;
		{
			int low = 0, high = n - 1;
			while(low <= high) {
				int mid = low + high >> 1;
				if(calc(mid, T) <= R) l = mid, high = mid - 1;
				else low = mid + 1;
			}
		}
		{
			int low = 0, high = n - 1;
			while(low <= high) {
				int mid = low + high >> 1;
				if(calc(mid, T) >= L) r = mid, low = mid + 1;
				else high = mid - 1;
			}
		}
		int ans;
		if(l == -1 || calc(l, T) > R) ans = 0;
		else ans = r - l + 1;
		if(L <= T && T <= R) ans ++;
		printf("%lld\n", ans);
	}
	return 0;
}

Compilation message (stderr)

worst_reporter3.cpp: In function 'int main()':
worst_reporter3.cpp:33:19: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   33 |     int mid = low + high >> 1;
      |               ~~~~^~~~~~
worst_reporter3.cpp:41:19: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   41 |     int mid = low + high >> 1;
      |               ~~~~^~~~~~
worst_reporter3.cpp:20:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 |  scanf("%lld%lld", &n, &q);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~~
worst_reporter3.cpp:21:17: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |  rep(i, n) scanf("%lld", &d[i]);
      |            ~~~~~^~~~~~~~~~~~~~~
worst_reporter3.cpp:28:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   28 |   scanf("%lld%lld%lld", &T, &L, &R);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

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