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Submission #343271

# Submission time Handle Problem Language Result Execution time Memory
343271 2021-01-03T15:32:31 Z qwerasdfzxcl Sure Bet (CEOI17_sure) C++14
100 / 100
 104 ms 2796 KB 
/*#include <bits/stdc++.h>

typedef long long ll;
using namespace std;
ll a[100100];
ll b[100100];
ll bsum[100100];
int n;

ll query(ll val, int ac, int idx){
    ll ret=val-(ll)(idx+ac)*10000, tmp=bsum[idx]-(ll)(idx+ac)*10000;
    //printf("%lld %d %d: %lld\n", val, ac, idx, min(ret, tmp));
    return min(ret, tmp);
}

int psearch(ll val, int ac){
    int l=1, r=n-1, ret=1;
    while(l<=r){
        int m=(l+r)/2;
        if (query(val, ac, m)-query(val, ac, m+1)==10000){
            ret=m;
            r=m-1;
        }
        else l=m+1;
    }
    return ret;
}

int main(){
    scanf("%d", &n);
    for (int i=0;i<n;i++){
        double tmp1, tmp2;
        scanf("%lf %lf", &tmp1, &tmp2);
        a[i]=tmp1*10000;
        b[i]=tmp2*10000;
    }
    sort(a, a+n, greater<int>());
    sort(b, b+n, greater<int>());
    for (int i=0;i<n;i++){
        bsum[i+1]=bsum[i]+b[i];
    }
    ll ans=0, tmp=0;
    if (n<=1010){
        for (int i=0;i<n;i++){
            tmp += a[i];
            for (int j=0;j<=n;j++){
                ans=max(query(tmp, i+1, j), ans);
            }
        }
        double rans=ans;
        rans/=10000;
        printf("%.4lf", rans);
        return 0;
    }
    for (int i=0;i<n;i++){
        tmp += a[i];
        int idx=psearch(tmp, i+1);
        ans=max(max(query(tmp, i+1, idx-1), query(tmp, i+1, idx)), ans);
        //printf("%lld %d\n", ans, idx);
    }
    double rans=ans;
    rans/=10000;
    printf("%.4lf", rans);
    return 0;
}
*/

#include <bits/stdc++.h>

typedef long long ll;
using namespace std;
double a[100100];
double b[100100];
double bsum[100100];
int n;

double query(double val, int ac, int idx){
    double ret=val-(idx+ac), tmp=bsum[idx]-(idx+ac);
    //printf("%lf %d %d: %lf\n", val, ac, idx, min(ret, tmp));
    return min(ret, tmp);
}

int psearch(double val, int ac){
    int l=1, r=n-1, ret=n;
    while(l<=r){
        int m=(l+r)/2;
        double tmp=query(val, ac, m)-query(val, ac, m+1);
        if (tmp>=(double)0.999999 && tmp<=(double)1.000001){
            ret=m;
            r=m-1;
        }
        else l=m+1;
    }
    return ret;
}

int main(){
    scanf("%d", &n);
    for (int i=0;i<n;i++){
        scanf("%lf %lf", &a[i], &b[i]);
    }
    sort(a, a+n, greater<double>());
    sort(b, b+n, greater<double>());
    for (int i=0;i<n;i++){
        bsum[i+1]=bsum[i]+b[i];
    }
    double ans=0, tmp=0;
    if (n<=1010){
        for (int i=0;i<n;i++){
            tmp += a[i];
            for (int j=0;j<=n;j++){
                ans=max(query(tmp, i+1, j), ans);
            }
        }
        printf("%.4lf", ans);
        return 0;
    }
    for (int i=0;i<n;i++){
        tmp += a[i];
        int idx=psearch(tmp, i+1);
        ans=max(max(query(tmp, i+1, idx-1), query(tmp, i+1, idx)), ans);
        //printf("%lld %d\n", ans, idx);
    }
    printf("%.4lf", ans);
    return 0;
}

Compilation message

sure.cpp: In function 'int main()':
sure.cpp:98:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   98 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
sure.cpp:100:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  100 |         scanf("%lf %lf", &a[i], &b[i]);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 0 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 0 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 2 ms 364 KB Output is correct
13 Correct 2 ms 364 KB Output is correct
14 Correct 2 ms 364 KB Output is correct
15 Correct 2 ms 364 KB Output is correct
16 Correct 2 ms 364 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 0 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 2 ms 364 KB Output is correct
13 Correct 2 ms 364 KB Output is correct
14 Correct 2 ms 364 KB Output is correct
15 Correct 2 ms 364 KB Output is correct
16 Correct 2 ms 364 KB Output is correct
17 Correct 83 ms 2796 KB Output is correct
18 Correct 90 ms 2796 KB Output is correct
19 Correct 104 ms 2692 KB Output is correct
20 Correct 81 ms 2668 KB Output is correct
21 Correct 88 ms 2596 KB Output is correct
22 Correct 85 ms 2796 KB Output is correct
23 Correct 85 ms 2724 KB Output is correct
24 Correct 82 ms 2668 KB Output is correct
25 Correct 81 ms 2668 KB Output is correct
26 Correct 84 ms 2668 KB Output is correct