Submission #471528

#	Time	Username	Problem	Language	Result	Execution time	Memory
471528		jazzup	Pilot (NOI19_pilot)	C++14	40 / 100	85 ms	15512 KiB

pilot

#include<cstdio>
#include<algorithm>
#include<set>
#include<vector>

using namespace std;

long long ans[1000007];
pair<int,int> a[1000007];
set<int> b;

int main(){
	int n,q,y;
	set<int>::iterator it;
	scanf("%d%d",&n,&q);
	for(int i=0;i<n;i++){
		scanf("%d",&a[i].first);
		a[i].second=i+1;
	}

	sort(a,a+n,greater<pair<int,int> >());

	long long cur= (n*(n-1))/2 + n;

	int idx=0;
	b.insert(0);
	b.insert(n+1);

	for(int i=1000000;i>0;i--){
		while(i<a[idx].first){
			it=b.lower_bound(a[idx].second);
			int r=*it;

			it--;
			int l=*it;
			
			int diff=r-l-1;
			cur-=((diff*(diff-1))/2 + diff);

			diff=r-a[idx].second-1;
			cur+=((diff*(diff-1))/2 + diff);

			diff=a[idx].second-l-1;
			cur+=((diff*(diff-1))/2 + diff);

			b.insert(a[idx].second);

			idx++;

			if(idx==n){
				break;
			}
		}
		if(idx==n)break;
		ans[i]=cur;
	}

	for(int i=0;i<q;i++){
		scanf("%d",&y);
		printf("%lld\n",ans[y]);
	}
	return 0;

}

Compilation message (stderr)

pilot.cpp: In function 'int main()':
pilot.cpp:15:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |  scanf("%d%d",&n,&q);
      |  ~~~~~^~~~~~~~~~~~~~
pilot.cpp:17:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |   scanf("%d",&a[i].first);
      |   ~~~~~^~~~~~~~~~~~~~~~~~
pilot.cpp:59:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   59 |   scanf("%d",&y);
      |   ~~~~~^~~~~~~~~

• Subtask 1: 3 / 3
• Subtask 2: 10 / 10
• Subtask 3: 12 / 12
• Subtask 4: 15 / 15
• Subtask 5: 0 / 5
• Subtask 6: 0 / 9
• Subtask 7: 0 / 14
• Subtask 8: 0 / 10
• Subtask 9: 0 / 11
• Subtask 10: 0 / 11