oj.uz

Submission #85516

# Submission time Handle Problem Language Result Execution time Memory
85516 2018-11-20T16:31:40 Z nikolapesic2802 Sparklers (JOI17_sparklers) C++14
100 / 100
 35 ms 1876 KB 
#include <bits/stdc++.h>

#define ll long long

using namespace std;

int main()
{
    int n,k,t;
    scanf("%i %i %i",&n,&k,&t);
    if(n==1)
    {
        printf("0\n");
        return 0;
    }
    vector<int> arr(n+1);
    for(int i=1;i<=n;i++)
    {
        scanf("%i",&arr[i]);
    }
    int le=0,ri=5e8;
    while(le<ri)
    {
        int m=(le+ri)/2;
        vector<ll> X(n+1);
        for(int i=1;i<=n;i++)
        {
            X[i]=arr[i]-(ll)2*m*t*(i-1);
        }
        int l=k,r=k;
        ll minn=X[k],maxx=X[k];
        int ok=1;
        while(ok)
        {
            ok=0;
            while(l>1&&X[l-1]>=minn)
            {
                ok=1;
                l--;
                maxx=max(maxx,X[l]);
            }
            while(r<n&&X[r+1]<=maxx)
            {
                ok=1;
                r++;
                minn=min(minn,X[r]);
            }
        }
        if(l==1&&r==n)
        {
            if(X[1]<X[n])
            {
                le=m+1;
                continue;
            }
            maxx=X[1];
            minn=X[n];
            ok=1;
            while(ok)
            {
                ok=0;
                while(l<k&&X[l+1]>=minn)
                {
                    ok=1;
                    l++;
                    maxx=max(maxx,X[l]);
                }
                while(r>k&&X[r-1]<=maxx)
                {
                    ok=1;
                    r--;
                    minn=min(minn,X[r]);
                }
            }
            if(r==k&&l==k)
            {
                ri=m;
            }
            else
            {
                le=m+1;
            }
        }
        else
        {
            le=m+1;
        }
    }
    printf("%i\n",le);
    return 0;
}

Compilation message

sparklers.cpp: In function 'int main()':
sparklers.cpp:10:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%i %i %i",&n,&k,&t);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~
sparklers.cpp:19:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%i",&arr[i]);
         ~~~~~^~~~~~~~~~~~~~

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 484 KB Output is correct
3 Correct 2 ms 484 KB Output is correct
4 Correct 2 ms 484 KB Output is correct
5 Correct 2 ms 484 KB Output is correct
6 Correct 2 ms 552 KB Output is correct
7 Correct 2 ms 568 KB Output is correct
8 Correct 2 ms 568 KB Output is correct
9 Correct 2 ms 568 KB Output is correct
10 Correct 2 ms 568 KB Output is correct
11 Correct 2 ms 568 KB Output is correct
12 Correct 2 ms 568 KB Output is correct
13 Correct 2 ms 568 KB Output is correct
14 Correct 2 ms 568 KB Output is correct
15 Correct 2 ms 568 KB Output is correct
16 Correct 2 ms 568 KB Output is correct
17 Correct 2 ms 608 KB Output is correct
18 Correct 2 ms 608 KB Output is correct
19 Correct 2 ms 608 KB Output is correct
20 Correct 2 ms 608 KB Output is correct
21 Correct 2 ms 636 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 484 KB Output is correct
3 Correct 2 ms 484 KB Output is correct
4 Correct 2 ms 484 KB Output is correct
5 Correct 2 ms 484 KB Output is correct
6 Correct 2 ms 552 KB Output is correct
7 Correct 2 ms 568 KB Output is correct
8 Correct 2 ms 568 KB Output is correct
9 Correct 2 ms 568 KB Output is correct
10 Correct 2 ms 568 KB Output is correct
11 Correct 2 ms 568 KB Output is correct
12 Correct 2 ms 568 KB Output is correct
13 Correct 2 ms 568 KB Output is correct
14 Correct 2 ms 568 KB Output is correct
15 Correct 2 ms 568 KB Output is correct
16 Correct 2 ms 568 KB Output is correct
17 Correct 2 ms 608 KB Output is correct
18 Correct 2 ms 608 KB Output is correct
19 Correct 2 ms 608 KB Output is correct
20 Correct 2 ms 608 KB Output is correct
21 Correct 2 ms 636 KB Output is correct
22 Correct 2 ms 636 KB Output is correct
23 Correct 2 ms 636 KB Output is correct
24 Correct 2 ms 636 KB Output is correct
25 Correct 2 ms 636 KB Output is correct
26 Correct 3 ms 636 KB Output is correct
27 Correct 2 ms 636 KB Output is correct
28 Correct 2 ms 636 KB Output is correct
29 Correct 2 ms 636 KB Output is correct
30 Correct 2 ms 636 KB Output is correct
31 Correct 2 ms 636 KB Output is correct
32 Correct 2 ms 636 KB Output is correct
33 Correct 2 ms 636 KB Output is correct
34 Correct 2 ms 636 KB Output is correct
35 Correct 2 ms 636 KB Output is correct
36 Correct 2 ms 636 KB Output is correct
37 Correct 2 ms 636 KB Output is correct
38 Correct 2 ms 636 KB Output is correct
39 Correct 2 ms 636 KB Output is correct
40 Correct 2 ms 636 KB Output is correct

Subtask #3
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 484 KB Output is correct
3 Correct 2 ms 484 KB Output is correct
4 Correct 2 ms 484 KB Output is correct
5 Correct 2 ms 484 KB Output is correct
6 Correct 2 ms 552 KB Output is correct
7 Correct 2 ms 568 KB Output is correct
8 Correct 2 ms 568 KB Output is correct
9 Correct 2 ms 568 KB Output is correct
10 Correct 2 ms 568 KB Output is correct
11 Correct 2 ms 568 KB Output is correct
12 Correct 2 ms 568 KB Output is correct
13 Correct 2 ms 568 KB Output is correct
14 Correct 2 ms 568 KB Output is correct
15 Correct 2 ms 568 KB Output is correct
16 Correct 2 ms 568 KB Output is correct
17 Correct 2 ms 608 KB Output is correct
18 Correct 2 ms 608 KB Output is correct
19 Correct 2 ms 608 KB Output is correct
20 Correct 2 ms 608 KB Output is correct
21 Correct 2 ms 636 KB Output is correct
22 Correct 2 ms 636 KB Output is correct
23 Correct 2 ms 636 KB Output is correct
24 Correct 2 ms 636 KB Output is correct
25 Correct 2 ms 636 KB Output is correct
26 Correct 3 ms 636 KB Output is correct
27 Correct 2 ms 636 KB Output is correct
28 Correct 2 ms 636 KB Output is correct
29 Correct 2 ms 636 KB Output is correct
30 Correct 2 ms 636 KB Output is correct
31 Correct 2 ms 636 KB Output is correct
32 Correct 2 ms 636 KB Output is correct
33 Correct 2 ms 636 KB Output is correct
34 Correct 2 ms 636 KB Output is correct
35 Correct 2 ms 636 KB Output is correct
36 Correct 2 ms 636 KB Output is correct
37 Correct 2 ms 636 KB Output is correct
38 Correct 2 ms 636 KB Output is correct
39 Correct 2 ms 636 KB Output is correct
40 Correct 2 ms 636 KB Output is correct
41 Correct 18 ms 1276 KB Output is correct
42 Correct 3 ms 1276 KB Output is correct
43 Correct 7 ms 1276 KB Output is correct
44 Correct 27 ms 1788 KB Output is correct
45 Correct 27 ms 1788 KB Output is correct
46 Correct 29 ms 1788 KB Output is correct
47 Correct 31 ms 1788 KB Output is correct
48 Correct 30 ms 1788 KB Output is correct
49 Correct 28 ms 1788 KB Output is correct
50 Correct 28 ms 1788 KB Output is correct
51 Correct 30 ms 1788 KB Output is correct
52 Correct 28 ms 1876 KB Output is correct
53 Correct 31 ms 1876 KB Output is correct
54 Correct 35 ms 1876 KB Output is correct
55 Correct 27 ms 1876 KB Output is correct
56 Correct 29 ms 1876 KB Output is correct
57 Correct 28 ms 1876 KB Output is correct
58 Correct 30 ms 1876 KB Output is correct
59 Correct 21 ms 1876 KB Output is correct
60 Correct 28 ms 1876 KB Output is correct
61 Correct 30 ms 1876 KB Output is correct
62 Correct 28 ms 1876 KB Output is correct
63 Correct 29 ms 1876 KB Output is correct
64 Correct 32 ms 1876 KB Output is correct
65 Correct 27 ms 1876 KB Output is correct
66 Correct 27 ms 1876 KB Output is correct
67 Correct 29 ms 1876 KB Output is correct
68 Correct 27 ms 1876 KB Output is correct
69 Correct 29 ms 1876 KB Output is correct