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ID题目提交者结果用时内存语言文件大小提交时间测评时间
#402588#6744. Squaremulberry#AC ✓106ms3604kbC++231.1kb2024-04-30 23:17:502024-04-30 23:17:51

Judging History

你现在查看的是最新测评结果

  • [2024-04-30 23:17:51]
  • 评测
  • 测评结果:AC
  • 用时:106ms
  • 内存:3604kb
  • [2024-04-30 23:17:50]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;
#define int long long
void solve()
{
    int l,r;
    cin>>l>>r;
    if(l>=r) cout<<l-r<<'\n';
    else
    {
        auto Sol=[&](int x)->int
        {
            int st=(int)(1.0*sqrtl(2LL*x)+1.5);
            int sum=r-x;
            int l=st,r=(int)1e12;
            while(l+1<r)
            {
                int mid=(l+r)/2;
                if((__int128)(st+mid)*(mid-st+1)/2>=sum) r=mid;
                else l=mid;
            }
            if((__int128)(st+l)*(l-st+1)/2>=sum) return (__int128)(st+l)*(l-st+1)/2-sum + (l-st+1);
            else return (__int128)(st+r)*(r-st+1)/2-sum + (r-st+1);
        };
        // cout<<Sol(l)<<' '<<Sol(l-1)+1<<'\n';
        int k=(int)(1.0*sqrtl(2LL*l)+1.5);
        int lower=(1+k-2)*(k-2)/2;
        // cout<<lower<<'\n';
        cout<<min(Sol(l),Sol(lower)+l-lower)<<'\n';
    }
}
signed main()
{
    ios::sync_with_stdio;
    cin.tie(0);
    int T;cin>>T;
    while (T--) solve();
    return 0;
}
/*
3
10 1000000000000000000
1 1000000000000000000
1000000000000000000 1
*/

详细

Test #1:

score: 100
Accepted
time: 1ms
memory: 3604kb

input:

2
5 1
1 5

output:

4
3

result:

ok 2 number(s): "4 3"

Test #2:

score: 0
Accepted
time: 106ms
memory: 3604kb

input:

100000
1 1
1 2
1 3
1 4
1 5
1 6
1 7
1 8
1 9
1 10
1 11
1 12
1 13
1 14
1 15
1 16
1 17
1 18
1 19
1 20
1 21
1 22
1 23
1 24
1 25
1 26
1 27
1 28
1 29
1 30
1 31
1 32
1 33
1 34
1 35
1 36
1 37
1 38
1 39
1 40
1 41
1 42
1 43
1 44
1 45
1 46
1 47
1 48
1 49
1 50
1 51
1 52
1 53
1 54
1 55
1 56
1 57
1 58
1 59
1 60
1 ...

output:

0
2
1
4
3
2
6
5
4
3
8
7
6
5
4
10
9
8
7
6
5
12
11
10
9
8
7
6
14
13
12
11
10
9
8
7
16
15
14
13
12
11
10
9
8
18
17
16
15
14
13
12
11
10
9
20
19
18
17
16
15
14
13
12
11
10
22
21
20
19
18
17
16
15
14
13
12
11
24
23
22
21
20
19
18
17
16
15
14
13
12
26
25
24
23
22
21
20
19
18
1
0
2
2
1
3
4
3
2
4
6
5
4
3
5
...

result:

ok 100000 numbers