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Submission #865666

# Submission time Handle Problem Language Result Execution time Memory
865666 2023-10-24T13:27:35 Z vjudge1 Sure Bet (CEOI17_sure) C++17
60 / 100
 69 ms 4696 KB 
/// tree bends in youth
/// 24  .10.2023
/// success is doing same thing in every single day!!!
#include <bits/stdc++.h>
#define ll long long
#define pb push_back
#define all(x) x.begin(), x.end()
#define F first
#define S second
using namespace std;
const ll N =2e5+ 5;
const ll NN =2e6 + 5;
const ll INF = -1e1;
const ll MOD = 1e9 + 7;
const ll LG = 18;
const ll k = 316;
double z[N],x[N],pl[N],pr[N];
void solve(){
    int n;
    cin >> n;
    for(int i = 1;i <= n;i++){
        cin >> z[i] >> x[i];
    }
    sort(z + 1,z + n + 1);
    sort(x + 1,x + n + 1);
    reverse(z + 1,z + n + 1);
    reverse(x + 1,x + n + 1);
    for(int i = 1;i <= n;i++){
        pr[i] = pr[i - 1] + z[i];
        pl[i] = pl[i - 1] + x[i];
    }
    double ans = 0;
    for(int i = 1;i <= n;i++){
        int l = 1,r = n;
        while(l <= r){
            int mid = (l + r) / 2;
            if(pl[mid] >= pr[i])r = mid - 1;
            else l = mid + 1;
        }
        double cnt = double(i) + double(l);
        double res = pr[i] - cnt;
        if(pl[l] <= pr[i])break;
        ans = max(ans,res);
    }
    for(int i = 1;i<=n;i++){
        int l = 1,r = n;
        while(l <= r){
            int mid = (l + r) / 2;
            if(pr[mid] > pl[i])r = mid - 1;
            else l = mid + 1;
        }
        double cnt = double(i)+ double(l);
        double res = pl[i] - cnt;
        if(pr[l] <= pl[i])break;
        ans = max(ans,res);
    }
//    printf("%.4lf",(double)ans);
    cout << fixed << setprecision(4) << ans;
}
main (){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
//    freopen("input.txt","r",stdin);
//    freopen("output.txt","w",stdout);
    ll abd= 1;
//    cin >> abd;
    for(ll i = 1;i <= abd;i++){
//        cout << "Case " << i << ":\n";
        solve();
    }
}

Compilation message

sure.cpp:60:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   60 | main (){
      | ^~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 1 ms 2392 KB Output is correct
5 Correct 0 ms 2396 KB Output is correct
6 Correct 1 ms 2520 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 1 ms 2392 KB Output is correct
5 Correct 0 ms 2396 KB Output is correct
6 Correct 1 ms 2520 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 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 1 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 1 ms 2392 KB Output is correct
5 Correct 0 ms 2396 KB Output is correct
6 Correct 1 ms 2520 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 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 1 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 65 ms 4692 KB Output is correct
18 Correct 63 ms 4696 KB Output is correct
19 Correct 62 ms 4692 KB Output is correct
20 Correct 64 ms 4560 KB Output is correct
21 Correct 69 ms 4692 KB Output is correct
22 Incorrect 61 ms 4500 KB Output isn't correct
23 Halted 0 ms 0 KB -