oj.uz

Submission #201824

# Submission time Handle Problem Language Result Execution time Memory
201824 2020-02-12T06:05:21 Z abil Sure Bet (CEOI17_sure) C++14
100 / 100
 357 ms 6776 KB 
#include <bits/stdc++.h>

#define fr first
#define sc second
#define pb push_back
#define all(s) s.begin(),s.end()
//#define int long long
#define double long double
using namespace std;

const int N = (1e6 + 12);
const int mod = (1e9 + 12);
const int inf = (1e9 + 12);

double a[N], b[N], pr[N];

bool cmp(double x, double y){
  return x > y;
}

main()
{
  int n;
  scanf("%d", &n);
  for(int i = 1;i <= n; i++){
    cin >> a[i] >> b[i];
  }
  sort(a + 1,a + 1 + n, cmp);
  sort(b + 1,b + 1 + n, cmp);
  double ans = 0.000000000000000000, sum = 0.000000000000000000;
  pr[0] = 0.000000000000000000;
  for(int j = 1;j <= n; j++){
    pr[j] = pr[j - 1] + b[j];
  }
  for(int i = 1;i <= n; i++){
    sum += a[i];
    int l = 1, r = n;
    while(r - l > 1){
      int mid = (r + l) >> 1;
      if(pr[mid] > sum){
        r = mid;
      }
      else{
        l = mid;
      }
    }
    for(int j = max(1, l - 100); j <= min(n, r + 100); j++){
      double x = j, y = i;
      ans = max(ans, min(pr[j], sum) - (x + y));
    }
  }
  cout << fixed << setprecision(4) << ans;
}

Compilation message

sure.cpp:21:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main()
      ^
sure.cpp: In function 'int main()':
sure.cpp:24:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &n);
   ~~~~~^~~~~~~~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 376 KB Output is correct
2 Correct 5 ms 376 KB Output is correct
3 Correct 5 ms 376 KB Output is correct
4 Correct 5 ms 376 KB Output is correct
5 Correct 5 ms 376 KB Output is correct
6 Correct 6 ms 376 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 376 KB Output is correct
2 Correct 5 ms 376 KB Output is correct
3 Correct 5 ms 376 KB Output is correct
4 Correct 5 ms 376 KB Output is correct
5 Correct 5 ms 376 KB Output is correct
6 Correct 6 ms 376 KB Output is correct
7 Correct 5 ms 376 KB Output is correct
8 Correct 5 ms 376 KB Output is correct
9 Correct 5 ms 376 KB Output is correct
10 Correct 5 ms 376 KB Output is correct
11 Correct 5 ms 376 KB Output is correct
12 Correct 8 ms 376 KB Output is correct
13 Correct 7 ms 376 KB Output is correct
14 Correct 8 ms 376 KB Output is correct
15 Correct 8 ms 376 KB Output is correct
16 Correct 9 ms 376 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 376 KB Output is correct
2 Correct 5 ms 376 KB Output is correct
3 Correct 5 ms 376 KB Output is correct
4 Correct 5 ms 376 KB Output is correct
5 Correct 5 ms 376 KB Output is correct
6 Correct 6 ms 376 KB Output is correct
7 Correct 5 ms 376 KB Output is correct
8 Correct 5 ms 376 KB Output is correct
9 Correct 5 ms 376 KB Output is correct
10 Correct 5 ms 376 KB Output is correct
11 Correct 5 ms 376 KB Output is correct
12 Correct 8 ms 376 KB Output is correct
13 Correct 7 ms 376 KB Output is correct
14 Correct 8 ms 376 KB Output is correct
15 Correct 8 ms 376 KB Output is correct
16 Correct 9 ms 376 KB Output is correct
17 Correct 333 ms 4984 KB Output is correct
18 Correct 338 ms 4984 KB Output is correct
19 Correct 333 ms 4984 KB Output is correct
20 Correct 336 ms 4984 KB Output is correct
21 Correct 352 ms 4984 KB Output is correct
22 Correct 329 ms 4984 KB Output is correct
23 Correct 343 ms 5112 KB Output is correct
24 Correct 329 ms 6392 KB Output is correct
25 Correct 331 ms 6520 KB Output is correct
26 Correct 357 ms 6776 KB Output is correct