Submission #570721

#	Time	Username	Problem	Language	Result	Execution time	Memory
570721		radaiosm7	Sure Bet (CEOI17_sure)	C++98	100 / 100	85 ms	3584 KiB

sure

#include <bits/stdc++.h>
using namespace std;
int n, i, j;
double a[100005];
double b[100005];
double ans, profa, profb;

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

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

  sort(a, a+n, greater<double>());
  sort(b, b+n, greater<double>());
  ans = 0.0;
  i = 0;
  j = 0;

  while (i < n && j < n) {
    profa -= 1.0;
    profb -= 1.0;

    if (profa < profb) profa += a[i++];
    else profb += b[j++];
    ans = max(ans, min(profa, profb));
  }

  if (i == n) while (j < n) {
      profa -= 1.0;
      profb += b[j++]-1.0;
      ans = max(ans, min(profa, profb));
  }

  else if (j == n) while (i < n) {
      profa += a[i++]-1.0;
      profb -= 1.0;
      ans = max(ans, min(profa, profb));
  }

  printf("%.4lf\n", ans);
  return 0;
}

Compilation message (stderr)

sure.cpp: In function 'int main()':
sure.cpp:9:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    9 |   scanf("%d", &n);
      |   ~~~~~^~~~~~~~~~
sure.cpp:12:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |     scanf("%lf", &a[i]);
      |     ~~~~~^~~~~~~~~~~~~~
sure.cpp:13:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |     scanf("%lf", &b[i]);
      |     ~~~~~^~~~~~~~~~~~~~

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