Submission #309545

#	Time	Username	Problem	Language	Result	Execution time	Memory
309545		bigg	Sure Bet (CEOI17_sure)	C++14	60 / 100	2069 ms	4984 KiB

sure

#include<bits/stdc++.h>
using namespace std;
typedef double ll;
const int MAXN = 1e5 + 10;
ll prefa[MAXN], prefb[MAXN], a[MAXN], b[MAXN];
int n;

int main(){
	scanf("%d", &n );
	for(int i = 1; i <= n; i++){
		scanf("%lf %lf", &a[i], &b[i]);
	}
	sort(a + 1, a + 1 + n);
	sort(b + 1, b + 1 + n);
	for(int i = 1; i <= n; i++){
		prefb[i] = prefb[i-1] + b[i];
		prefa[i] = prefa[i-1] + a[i];
	}
	double ans = 0;
	for(int numa = 0; numa <= n; numa++){
		for(int numb = 0; numb <= n; numb++){
			double bloc = prefb[n] -  prefb[n - numb];
			double aloc = prefa[n] -  prefa[n - numa];
			//printf("%lf %lf\n", bloc, aloc );
			ans = max(ans, min(bloc - numb - numa, aloc - numa - numb));
		}
	}
	printf("%.4lf\n", ans);

}

Compilation message (stderr)

sure.cpp: In function 'int main()':
sure.cpp:9:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    9 |  scanf("%d", &n );
      |  ~~~~~^~~~~~~~~~~
sure.cpp:11:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   11 |   scanf("%lf %lf", &a[i], &b[i]);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 20 / 20
• Subtask 2: 40 / 40
• Subtask 3: 0 / 40