Submission #29453

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
29453	2017-07-19 11:39:30	kdh9949	Taxis (POI13_tak)	C++14	60 / 100	169 ms	5924 KiB

tak

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#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
int n, t;
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);
  sort(a, a + n, greater<int>());
  t = int(upper_bound(a, a + n, d - b, greater<int>()) - a - 1);
  int cnt = 0;
  for(int i = 0; i < n; i++){
    if(a[i] >= max(d - b, b + d - 2 * x)){
      printf("%d\n", cnt + 1);
      return 0;
    }
    if(i == t) continue;
    x += a[i] - (b - x);
    cnt++;
    if(a[t] >= max(d - b, b + d - 2 * x)){
      printf("%d\n", cnt + 1);
      return 0;
    }
  }
  puts("0");
}
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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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: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10