Submission #379274

#	Time	Username	Problem	Language	Result	Execution time	Memory
379274		nafis_shifat	Worst Reporter 3 (JOI18_worst_reporter3)	C++14	100 / 100	700 ms	29420 KiB

worst_reporter3

#include<bits/stdc++.h>
#define ll long long
#define pii pair<int,int>
using namespace std;
const int mxn=1e5+5;
const int inf=1e9;
int main() {
	int n,q;
	cin >> n >> q;

	ll d[n + 1];
	for(int i = 1; i <= n; i++) scanf("%lld",&d[i]);

	ll jump[n + 2];
    jump[0] = 1;

    for(int i = 1; i <= n; i++) {
    	jump[i] = jump[i - 1] * ((d[i] + jump[i - 1] - 1) / jump[i - 1]);
    }


	while(q--) {
		ll t,l,r;
		scanf("%lld %lld %lld",&t,&l,&r);
		ll lo = 0;
		ll hi  = n;
		ll upb = -1,lwb = -1;

		while(lo <= hi) {
			ll mid = lo + hi >> 1;
			ll x = t / jump[mid];
			ll p = -mid + x * jump[mid];
			if(p <= r) {
				upb = mid;
				hi = mid - 1;
			} else {
				lo = mid + 1;
			}
		}


		lo = 0;
		hi = n;
		while(lo <= hi) {
			ll mid = lo + hi >> 1;
			ll x = t / jump[mid];
			ll p = -mid + x * jump[mid];
			if(p >= l) {
				lwb = mid;
				lo = mid + 1;
			} else {
				hi = mid - 1;
			}
		}

		
		ll ans;
		if(lwb < upb || lwb == -1 || upb == -1) ans = 0;
		else ans = lwb - upb + 1;

		printf("%lld\n",ans );
	}
	
}

Compilation message (stderr)

worst_reporter3.cpp: In function 'int main()':
worst_reporter3.cpp:30:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   30 |    ll mid = lo + hi >> 1;
      |             ~~~^~~~
worst_reporter3.cpp:45:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   45 |    ll mid = lo + hi >> 1;
      |             ~~~^~~~
worst_reporter3.cpp:12:35: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   12 |  for(int i = 1; i <= n; i++) scanf("%lld",&d[i]);
      |                              ~~~~~^~~~~~~~~~~~~~
worst_reporter3.cpp:24:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   24 |   scanf("%lld %lld %lld",&t,&l,&r);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

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