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QOJ
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 |
---|---|---|---|---|---|---|---|---|---|
#419117 | #5117. Find Maximum | reverSilly | AC ✓ | 29ms | 4184kb | C++23 | 2.1kb | 2024-05-23 18:00:11 | 2024-05-23 18:00:12 |
Judging History
answer
#include<bits/stdc++.h>
#define dbg //cerr<<__PRETTY_FUNCTION__<<' '<<__LINE__<<'\n'
using namespace std;
using i64=long long;
constexpr int LIM{100000};
int cache[LIM];
int f(i64 i)
{
if(i<LIM&&cache[i]!=-1)
return cache[i];
int ans;
if(i==0)
ans=1;
else if(i%3==0)
ans=f(i/3)+1;
else
ans=f(i-1)+1;
if(i<LIM)
cache[i]=ans;
return ans;
}
int log3(i64 x)
{
if(x==0)
return 1;
return log2(x)/log2(3)+1;
}
void itoa(i64 number,char *dest,int n){
stack<char> s;
if (number == 0)
{
s.push(0);
} else
{
while (number) {
s.push(number % n);
number /= n;
}
}
while (!s.empty())
{
*(dest++)=s.top();
// printf("%d", s.top());
s.pop();
}
*(dest++)=12;
}
i64 solve(i64 l,i64 r)
{
char l3[55],r3[55];
itoa(l,l3+log3(r)-log3(l),3);
itoa(r,r3,3);
fill_n(l3,log3(r)-log3(l),0);
dbg;
// for(int i=0;l3[i]!=12;++i)
// cout<<(char)(l3[i]+'0');
// cout<<'\n';
// for(int i=0;r3[i]!=12;++i)
// cout<<(char)(r3[i]+'0');
// cout<<'\n';//2101000201022101010212021100000112101
int ans=-1;
for(int i=0,tag=0;l3[i]!=12;++i)
{
dbg;
if(r3[i]!=l3[i]||tag!=0)
{
dbg;
// cout<<(i==0&&r3[0]==1)<<'\n';
ans=max(ans,log3(r)-(i==0&&r3[0]==1)+accumulate(r3,r3+i+1,0)-1+(log3(r)-i-1)*2);
dbg;
// for(int i=1;i<20;++i)
// {
// if(r-i>=l)
// ans=max(ans,f(r-i));
// }
dbg;
tag=1;
}
}
dbg;
return ans;
}
int T;
int main()
{
// f(279345354637770906ll);
// return 0;
cin.tie(nullptr);
ios::sync_with_stdio(false);
fill_n(cache,LIM,-1);
dbg;
// char ch[10];
// itoa(10,ch,3);
// cout<<ch;
// return 0;
// for(int i=0;i<200;++i)
// cout<<i<<' '<<f(i)<<'\n';
cin>>T;
while(T--)
{
dbg;
i64 l,r;
cin>>l>>r;
cout<<solve(l,r+1)<<'\n';
}
return 0;
}
详细
Test #1:
score: 100
Accepted
time: 1ms
memory: 4184kb
input:
10 1 2 1 3 1 4 1 5 2 3 2 4 2 5 3 4 3 5 4 5
output:
3 3 4 5 3 4 5 4 5 5
result:
ok 10 numbers
Test #2:
score: 0
Accepted
time: 2ms
memory: 3936kb
input:
5050 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 61...
output:
2 3 3 4 5 5 5 6 6 6 6 6 6 7 7 7 8 8 8 8 8 8 8 8 8 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 10 10 10 10 10 10 10 10 10 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 3 3 4 5 5 5 6 6 6 6 6 6 7 7 7 8 8 8 8 8 8 8...
result:
ok 5050 numbers
Test #3:
score: 0
Accepted
time: 29ms
memory: 4112kb
input:
10000 2924776299390853 348932224550662831 638290869233943020 897334616745111026 210780034220004669 279345354637770906 20574264013277469 387573622060864735 39441497975868873 806211034038773415 19845198891021950 243636832211738144 298454268109304380 988142879006387197 613847475002049291 86666797163210...
output:
110 112 109 110 112 108 113 112 110 107 109 113 110 111 111 111 109 108 111 113 111 111 113 112 111 110 111 108 111 110 111 111 112 111 113 109 111 110 108 111 111 113 110 110 110 112 110 107 111 111 109 107 112 111 110 111 112 111 111 112 111 111 109 111 110 111 112 111 113 110 113 112 112 110 110 ...
result:
ok 10000 numbers
Test #4:
score: 0
Accepted
time: 0ms
memory: 4052kb
input:
144 3 8 2 8 2 9 3 9 9 26 8 26 8 27 9 27 27 80 26 80 26 81 27 81 81 242 80 242 80 243 81 243 243 728 242 728 242 729 243 729 729 2186 728 2186 728 2187 729 2187 2187 6560 2186 6560 2186 6561 2187 6561 6561 19682 6560 19682 6560 19683 6561 19683 19683 59048 19682 59048 19682 59049 19683 59049 59049 17...
output:
6 6 6 6 9 9 9 9 12 12 12 12 15 15 15 15 18 18 18 18 21 21 21 21 24 24 24 24 27 27 27 27 30 30 30 30 33 33 33 33 36 36 36 36 39 39 39 39 42 42 42 42 45 45 45 45 48 48 48 48 51 51 51 51 54 54 54 54 57 57 57 57 60 60 60 60 63 63 63 63 66 66 66 66 69 69 69 69 72 72 72 72 75 75 75 75 78 78 78 78 81 81 81...
result:
ok 144 numbers