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Submission #303032

# Submission time Handle Problem Language Result Execution time Memory
303032 2020-09-19T19:00:03 Z Kenzo_1114 Sure Bet (CEOI17_sure) C++17
0 / 100
 1 ms 384 KB 
#include<bits/stdc++.h>
using namespace std;
const int MAXN = 100010;

int n;
double a[MAXN], b[MAXN], ans = 0.0000, sa = 0.0000, sb = 0.0000;

int main ()
{
	scanf("%d", &n);

	for(int i = 0; i < n; i++)
		scanf("%lf %lf", &a[i], &b[i]);

	sort(a, a + n);	reverse(a, a + n);
	sort(b, b + n);	reverse(b, b + n);

//	for(int i = 0; i < n; i++)	printf("a[%d] = %.4lf\n", i, a[i]);
//	for(int i = 0; i < n; i++)	printf("b[%d] = %.4lf\n", i, b[i]);

	int ida = 0, idb = 0;
	for(int i = 0; i < n; i++)
	{
		if(sa >= sb && idb < n)		sb += b[idb++];
		else if(sa < sb && ida < n)	sa += a[ida++];
		else	break;

		ans = max(ans, min(sa, sb) - i - 1);
	}

	printf("%.4lf\n", (double) ans);
}

/*
	
4
1.4 3.7
1.2 2
1.6 1.4 
1.9 1.5

*/

Compilation message

sure.cpp: In function 'int main()':
sure.cpp:10:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   10 |  scanf("%d", &n);
      |  ~~~~~^~~~~~~~~~
sure.cpp:13:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   13 |   scanf("%lf %lf", &a[i], &b[i]);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 256 KB Output is correct
2 Incorrect 1 ms 384 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 256 KB Output is correct
2 Incorrect 1 ms 384 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 256 KB Output is correct
2 Incorrect 1 ms 384 KB Output isn't correct
3 Halted 0 ms 0 KB -