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Car Fueling Problem Solution.cpp
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Car Fueling Problem Solution.cpp
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#include <bits/stdc++.h>
using namespace std;
int minRefills(int dist, int tank, vector<int> & stops, int start, int count) {
if ((start + tank) >= dist) {
return count;
}
if (stops.size() == 0) {
return -1;
}
int old_start = start;
for (int i = 0; i < stops.size(); i++) {
if (stops[i] <= (start + tank)) {
old_start = stops[i];
} else {
if (i != 0) {
stops.erase(stops.begin(), stops.begin() + i);
}
else {
stops.erase(stops.begin());
}
return minRefills(dist, tank, stops, old_start, count+1);
}
}
return (old_start + tank) >= dist ? count+1 : -1;
}
int calculateMinRefills(int dist, int tank, vector<int> & stops) {
return minRefills(dist, tank, stops, 0, 0);
}
int main() {
int totalDistance = 0;
cout << "Total Distance: ";
cin >> totalDistance;
int tankSize = 0;
cout << "Tank Size: ";
cin >> tankSize;
int stopsCount = 0;
cout << "Number of Gas Station: ";
cin >> stopsCount;
cout << "Enter " << stopsCount << " Gas Station Distance:" << endl;
vector<int> stops(stopsCount);
for (size_t i = 0; i < stopsCount; ++i)
cin >> stops.at(i);
cout << "\n\nMinimum number of refills : " << calculateMinRefills(totalDistance, tankSize, stops) << "\n";
return 0;
}