Submission #29467

#	Time	Username	Problem	Language	Result	Execution time	Memory
29467		kdh9949	Taxis (POI13_tak)	C++14	0 / 100	199 ms	5924 KiB

tak

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

int n, t, cnt, ans;
ll d, b, x, a[500010];

int main(){
	scanf("%lld%lld%d", &d, &b, &n);
	for(int i = 0; i < n; i++) scanf("%lld", a + i);
	ans = n + 1;
	sort(a, a + n, greater<int>());
	for(int i = 0; i < n; i++){
		if(x <= b) x += max(0LL, a[i] - (b - x));
		else x = max(x, b + a[i]);
		cnt++;
		if(x >= d){
			ans = min(ans, cnt);
			break;
		}
	}
	for(; t < n && a[t] >= d - b; t++); t--;
	cnt = 0;
	for(int i = 0; i < n; i++){
		if(i == t) continue;
		if(x <= b) x += max(0LL, a[i] - (b - x));
		else x = max(x, b + a[i]);
		cnt++;
		if(x >= d){
			ans = min(ans, cnt);
			break;
		}
		if(a[t] >= max(d - b, b + d - 2 * x)){
			ans = min(ans, cnt + 1);
			break;
		}
	}
	printf("%d\n", ans % (n + 1));
}

Compilation message (stderr)

tak.cpp: In function 'int main()':
tak.cpp:9:33: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lld%lld%d", &d, &b, &n);
                                 ^
tak.cpp:10:49: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i = 0; i < n; i++) scanf("%lld", a + i);
                                                 ^

• Subtask 1: 0 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10