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Submission #865664

# Submission time Handle Problem Language Result Execution time Memory
865664 2023-10-24T13:26:20 Z vjudge1 Sure Bet (CEOI17_sure) C++17
60 / 100
 71 ms 6228 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);
}
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:59:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   59 | main (){
      | ^~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2392 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 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 2392 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 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 1 ms 2504 KB Output is correct
9 Correct 1 ms 2392 KB Output is correct
10 Correct 1 ms 2392 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2648 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 0 ms 2392 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 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 1 ms 2504 KB Output is correct
9 Correct 1 ms 2392 KB Output is correct
10 Correct 1 ms 2392 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2648 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 63 ms 5924 KB Output is correct
18 Correct 63 ms 5972 KB Output is correct
19 Correct 63 ms 5992 KB Output is correct
20 Correct 66 ms 5912 KB Output is correct
21 Correct 71 ms 6228 KB Output is correct
22 Incorrect 63 ms 5928 KB Output isn't correct
23 Halted 0 ms 0 KB -