Elevator Trouble

input/code.cpp: In function 'int main()':
input/code.cpp:9:45: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d %d %d %d", &f, &s, &g, &u, &d);
                                             ^

#include <cstdio>
#include <deque>
#include <vector>

using namespace std;

int main() {
	int f, s, g, u, d;
	scanf("%d %d %d %d %d", &f, &s, &g, &u, &d);

	vector<bool> v(f+1);
	vector<int> dist(f+1);
	deque<int> q;

	q.push_back(s);
	v[s] = 1;
	dist[s] = 0;

	while(!q.empty()) {
		int c = q.front();
		q.pop_front();
		if (c == g) break;

		if (c - d >= 0 && !v[c - d]) {
			q.push_back(c - d);
			v[c - d] = 1;
			dist[c - d] = dist[c] + 1;
		}
		if (c + u <= f && !v[c + u]) {
			q.push_back(c + u);
			v[c + u] = 1;
			dist[c + u] = dist[c] + 1;
		}
	}

	if (v[g])
		printf("%d\n", dist[g]);
	else
		printf("use the stairs\n");
	return 0;
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED

Test 11

Verdict: ACCEPTED

Test 12

Verdict: ACCEPTED