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Submission #1027206

# Submission time Handle Problem Language Result Execution time Memory
1027206 2024-07-19T02:02:44 Z vjudge1 Sure Bet (CEOI17_sure) C++17
100 / 100
 108 ms 3580 KB 
// CEOI '17 P2 - Sure Bet
#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define el cout << '\n'
#define f1(i,n) for(ll i=1;i<=n;i++)
#define __file_name ""
using namespace std;
const ll maxn = 1e5+5, inf=1e18;

ll n;
ld a[maxn],b[maxn],L,R,mid;

bool check(ld x){
    ld s1 = 0, s2 = 0;
    ll cnt = 0, idx1 = n, idx2 = n;
    while(min(s1, s2) - cnt < x){
        if(s1 - cnt < x){
            if(idx1 == 0) return false;
            s1 += a[idx1];
            idx1--;
        }else{
            if(idx2 == 0) return false;
            s2 += b[idx2];
            idx2--;
        }
        cnt++;
    }
    return true;
}

int main(){
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);

    if(fopen(__file_name ".inp", "r")){
        freopen(__file_name ".inp","r",stdin);
        freopen(__file_name ".out","w",stdout);
    }
    // code here
    cin >> n;
    f1(i,n) cin >> a[i] >> b[i];
    sort(a+1,a+n+1);
    sort(b+1,b+n+1);
    L = 0; R = 1e8;
    f1(_, 60){
        mid = (L+R)/2;
        if(check(mid)) L = mid;
        else R = mid;
    }
    cout << fixed << setprecision(4);
    cout << R;
    return 0;
}

/*
Code by: Nguyen Viet Trung Nhan
Cau Giay Secondary School
*/

Compilation message

sure.cpp: In function 'int main()':
sure.cpp:36:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   36 |         freopen(__file_name ".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
sure.cpp:37:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |         freopen(__file_name ".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2396 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 0 ms 2396 KB Output is correct
6 Correct 0 ms 2396 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2396 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 0 ms 2396 KB Output is correct
6 Correct 0 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 0 ms 2396 KB Output is correct
10 Correct 0 ms 2396 KB Output is correct
11 Correct 0 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 2 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 1 ms 2544 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2396 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 0 ms 2396 KB Output is correct
6 Correct 0 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 0 ms 2396 KB Output is correct
10 Correct 0 ms 2396 KB Output is correct
11 Correct 0 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 2 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 1 ms 2544 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 80 ms 3580 KB Output is correct
18 Correct 86 ms 3420 KB Output is correct
19 Correct 88 ms 3420 KB Output is correct
20 Correct 88 ms 3420 KB Output is correct
21 Correct 96 ms 3380 KB Output is correct
22 Correct 75 ms 3452 KB Output is correct
23 Correct 78 ms 3404 KB Output is correct
24 Correct 86 ms 3412 KB Output is correct
25 Correct 108 ms 3420 KB Output is correct
26 Correct 97 ms 3408 KB Output is correct