1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
|
// 2187. Minimum Time to Complete Trips
#include <limits.h>
#include <stdio.h>
/*
* given array 'time' where 'time[i]' denotes the time taken by the 'i'th bus to
* complete one trip. each bus can make multiple trips successively; that is,
* the next trip can start immediately after completing the current trip. also,
* each bus operates independently; that is, the trips of one bus do not
* influence the trips of any other bus. also given an integer 'totalTrips',
* which denotes the number of trips all buses should make in total. return the
* minimum time required to complete all trips.
*/
long long minimumTime(int *time, int time_size, int total_trips) {
long long l = 0, r = LLONG_MAX / time_size;
while (l < r) {
long long m = (l + r) / 2, trips = 0;
for (int i = 0; i < time_size; i++)
trips += m / time[i];
if (trips < total_trips)
l = m + 1;
else
r = m;
}
return l;
}
int main() {
int t1[] = {1, 2, 3}, t2[] = {2};
printf("%lld\n", minimumTime(t1, 3, 5)); // expect: 3
printf("%lld\n", minimumTime(t2, 1, 1)); // expect: 2
}
|