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Submission #1027270

# Submission time Handle Problem Language Result Execution time Memory
1027270 2024-07-19T03:01:36 Z vjudge1 Sure Bet (CEOI17_sure) C++14
100 / 100
 70 ms 2000 KB 
#include <bits/stdc++.h>
#define fi first
#define se second
#define ll long long
#define ull unsigned long long
#define pii pair<int, int>
#define pll pair<ll, ll>
#define pb push_back
#define taskname ""
using namespace std;
ll n,i,l,r,mid;
double a[100009],b[100009],ans=0.0,ma,ans1,k;
int main() {
	if (fopen(taskname".inp","r")) {
		freopen(taskname".inp","r",stdin);
		freopen(taskname".out","w",stdout);
	}
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
    cin>>n;
    for(i=1;i<=n;i++){
        cin>>a[i]>>b[i];
    }sort(a+1,a+n+1,greater<>());
    sort(b+1,b+n+1,greater<>());
    for(i=1;i<=n;i++)
        a[i]+=a[i-1];
    for(i=1;i<=n;i++)
        b[i]+=b[i-1];
    for(i=0;i<=n;i++){
        ans1=a[i]-i;
        l=0;r=n;ma=0.0;
        while(l<=r){
            mid=(l+r)/2;
            k=min(ans1-mid,double(b[mid])-mid-i);
            if(k>=ma){
                ma=k;
                //if(i==3&&mid==1) cout<<k<<"\n";
                if(double(b[mid])-mid-i>ans1-mid) r=mid-1;
                else if(double(b[mid])-mid-i<ans1-mid) l=mid+1;
                else break;
            }else{
                if(double(b[mid])-mid-i<ans1-mid) l=mid+1;
                else r=mid-1;
            }
        }//if(i==4) cout<<ma;
        if(ans<ma) ans=ma;
        //cout<<ans<<"\n";
        //if(ans==1.1000) cout<<i<<"\n";
    }
    printf("%.4lf",(double)ans);
	return 0;
}

Compilation message

sure.cpp: In function 'int main()':
sure.cpp:15:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |   freopen(taskname".inp","r",stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
sure.cpp:16:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |   freopen(taskname".out","w",stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 600 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 600 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 55 ms 1884 KB Output is correct
18 Correct 52 ms 1872 KB Output is correct
19 Correct 70 ms 1996 KB Output is correct
20 Correct 54 ms 1884 KB Output is correct
21 Correct 66 ms 2000 KB Output is correct
22 Correct 54 ms 1880 KB Output is correct
23 Correct 59 ms 1876 KB Output is correct
24 Correct 55 ms 1876 KB Output is correct
25 Correct 57 ms 1872 KB Output is correct
26 Correct 57 ms 1872 KB Output is correct