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Submission #860221

# Submission time Handle Problem Language Result Execution time Memory
860221 2023-10-12T08:53:58 Z naneosmic Sure Bet (CEOI17_sure) C++14
0 / 100
 1 ms 600 KB 
#include <bits/stdc++.h>
#define int long long
#define float double
#define endl "\n"
using namespace std;
bool f(float a, float b){
    return a>b;
}
float binarySearch(vector<float>arr, float l, float r, float x){
    if(arr[l]>=x)
        return l;
    if(arr[r]<=x)
        return r-1;
    while (l <= r) {
        float m = l + (r - l) / 2;
        if(arr[m]<=x && arr[m+1]>=x)
            return m;
        if (arr[m+1] < x)
            l = m + 1;
        else
            r = m - 1;
    }
    return -1;
}
signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    float n;
    cin>>n;
    vector<float>a;
    vector<float>b;
    for(float i=0;i<n;i++){
        float a1,b1;
        cin>>a1>>b1;
        a.push_back(a1);
        b.push_back(b1);
    }
    sort(a.begin(),a.end(),f);
    sort(b.begin(),b.end(),f);
    vector<float>b_pref;
    float s=0;
    for(float i=0;i<n;i++){
        s+=b[i];
        b_pref.push_back(s);
    }
    s=0;
    float score=0;
    for(float i=0;i<n;i++){
        s+=a[i];
        float j=binarySearch(b_pref,0,n-1,s);
        float s1=min(s,b_pref[j])-i-j-2;
        float s2=min(s,b_pref[j+1])-i-j-3;
        score=max(score,s2);
        score=max(score,s1);
    }
    printf("%.4lf",(float)score);
}

Subtask #1
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 600 KB Output is correct
3 Incorrect 0 ms 348 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #2
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 600 KB Output is correct
3 Incorrect 0 ms 348 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 600 KB Output is correct
3 Incorrect 0 ms 348 KB Output isn't correct
4 Halted 0 ms 0 KB -