Submission #256664

#	Time	Username	Problem	Language	Result	Execution time	Memory
256664		ChrisT	Sure Bet (CEOI17_sure)	C++17	100 / 100	75 ms	3576 KiB

sure

#include<bits/stdc++.h>
using namespace std;
int main () {
	int n;
	scanf ("%d",&n);
	vector<double> a(n),b(n);
	for (int i = 0; i < n; i++) scanf ("%lf %lf",&a[i],&b[i]);
	sort(a.rbegin(),a.rend()); sort(b.rbegin(),b.rend());
	int bp = 0; double ret = 0, asum = 0, bsum = 0; int cnt = 0;
	for (int i = 0; i < n; i++) {
		asum += a[i]; ++cnt;
		while (bp < n && min(asum,bsum + b[bp]) - 1 >= min(asum,bsum)) {
			bsum += b[bp++]; ++cnt;
		}
		ret = max(ret,min(asum,bsum) - cnt);
	}
	printf ("%.4f\n",ret);
	return 0;
}

Compilation message (stderr)

sure.cpp: In function 'int main()':
sure.cpp:5:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf ("%d",&n);
  ~~~~~~^~~~~~~~~
sure.cpp:7:36: 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 ("%lf %lf",&a[i],&b[i]);
                              ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 20 / 20
• Subtask 2: 40 / 40
• Subtask 3: 40 / 40