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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#633138#9225. Fibonacci FusionMu_SilkTL 128ms182468kbC++201.5kb2024-10-12 14:37:412024-10-12 14:37:41

Judging History

你现在查看的是最新测评结果

  • [2024-10-12 14:37:41]
  • 评测
  • 测评结果:TL
  • 用时:128ms
  • 内存:182468kb
  • [2024-10-12 14:37:41]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

const int N=200010;
const int N1=10000010;
const ll M1=1e9+7;
const ll M2=1e9+9;
pair<ll,ll> fib[N1];
string s[200010];

void init(){
    fib[0]={0,0};
    fib[1]={1,1};
    for(int i=2;i<N1;i++){
        fib[i].first=(fib[i-1].first+fib[i-2].first)%M1;
        fib[i].second=(fib[i-1].second+fib[i-2].second)%M2;
    }
}

int lenfib(int n){
    return n*log10((1+sqrt(5))/2)-log10(sqrt(5));
}

void solve(){
    init();
    int n;cin>>n;
    for(int i=0;i<n;i++)cin>>s[i];
    sort(s,s+n,[&](const string& a,const string& b){
        return a.size()<b.size();
    });
    map<pair<ll,ll>,int> mp;
    ll ans=0;
    for(int i=0;i<n;i++){
        int len=s[i].size();
        int l=0,r=N1-1;
        while(r>=l){
            int m=(l+r)>>1;
            if(lenfib(m)>=len)r=m-1;
            else l=m+1;
        }
        pair<ll,ll> pi={0,0};
        for(auto c:s[i]){
            pi.first=(pi.first*10+c-'0')%M1;
            pi.second=(pi.second*10+c-'0')%M2;
        }
        for(int i=max(0,l-20);i<min(l+20,N1);i++){
            pair<ll,ll> tmp=pi;
            tmp.first=(fib[i].first-tmp.first+M1)%M1;
            tmp.second=(fib[i].second-tmp.second+M2)%M2;
            ans+=mp[tmp];
        }
        mp[pi]+=1;
    }
    cout<<ans<<"\n";
}

int main(){
    ios::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
    int n=1;
    // cin>>n;
    while(n--)solve();
    return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 33ms
memory: 166324kb

input:

6
50
8
8
5
72
354224848179261915070

output:

4

result:

ok 1 number(s): "4"

Test #2:

score: 0
Accepted
time: 57ms
memory: 170996kb

input:

28
200878223506436882933619847964496455022155117513398820563747455993172799881403389571477889821109288771413214004090719097929400406252135763028179112130390003528046316900603668569910008417315162907579003880220844686222148696041857432602133894827753998572080650383305777912447151917272483538029469449...

output:

27

result:

ok 1 number(s): "27"

Test #3:

score: 0
Accepted
time: 128ms
memory: 182468kb

input:

5187
2640352926124261912741724778991366987330659389621881876017670644497364093930668042530271338851702874394631009332660937266680740235862107353443518003194307853104942996827176097428402408674756368623972812842571069642405111849826172879369776309763468485788964245903781380419155348915131587410703749...

output:

6073

result:

ok 1 number(s): "6073"

Test #4:

score: 0
Accepted
time: 103ms
memory: 166120kb

input:

200000
2
2
2
2
1
2
1
1
2
2
1
1
1
2
2
1
1
2
1
1
2
2
1
2
2
2
1
1
1
1
2
2
1
2
1
2
1
1
2
2
1
1
1
2
1
1
2
1
2
2
2
2
1
2
2
1
1
1
2
1
1
1
1
1
2
1
2
2
1
1
1
2
2
2
1
1
2
1
1
2
1
2
1
1
1
2
2
2
1
1
1
1
2
1
2
1
1
2
2
1
1
2
1
1
2
1
2
2
1
2
1
2
2
1
1
2
1
1
1
2
2
2
1
2
2
1
1
2
2
2
2
1
2
1
1
2
1
2
2
1
1
1
1
2
2
2
2...

output:

15003749259

result:

ok 1 number(s): "15003749259"

Test #5:

score: -100
Time Limit Exceeded

input:

200000
944176313232170622314
2590599414036674999101
753315073608896000424
9299685298577430049245
9361800333778142620806
8988699166328904060999
9606920674025578304023
4203331868598952026136
5183047027116137697788
3968714342776915029801
8130984095583566992354
3206443643596048048798
6248561214283254355...

output:


result: