Submission #139366

#	Time	Username	Problem	Language	Result	Execution time	Memory
139366		Boxworld	Sails (IOI07_sails)	C++14	40 / 100	1074 ms	6296 KiB

sails

#include <bits/stdc++.h>
using namespace std;
const int maxN=100100;
pair<int,int> a[maxN];
multiset<int> S;
int main(){
	int n;
	scanf("%d",&n);
	for(int i=0;i<n;i++)scanf("%d%d",&a[i].first,&a[i].second);
	sort(a,a+n);
	int tmp=1;
	for(int i=0;i<n;i++){
		queue<int> Q;
		for (int j=tmp;j<=a[i].first;j++)S.insert(0);
		for (int j=0;j<a[i].second;j++){
			auto P=S.begin();
			Q.push(*P+1);
			S.erase(P);
		}
		for (int j=0;j<a[i].second;j++){
			S.insert(Q.front());
			Q.pop();
		}
		tmp=a[i].first+1;
	}
	long long ans=0;
	for (int i=0;i<a[n-1].first;i++){
		auto P=S.begin();
		int x=*P;
		ans+=x*(x-1)/2;
		S.erase(P);
	}
	printf("%lld\n",ans);
	return 0;
}

Compilation message (stderr)

sails.cpp: In function 'int main()':
sails.cpp:8:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
  ~~~~~^~~~~~~~~
sails.cpp:9:27: 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("%d%d",&a[i].first,&a[i].second);
                      ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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