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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#633063#9225. Fibonacci FusionMu_SilkWA 60ms172608kbC++201.5kb2024-10-12 14:28:152024-10-12 14:28:15

Judging History

你现在查看的是最新测评结果

  • [2024-10-12 14:28:15]
  • 评测
  • 测评结果:WA
  • 用时:60ms
  • 内存:172608kb
  • [2024-10-12 14:28:15]
  • 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){
        if(a.size()!=b.size())return a.size()<b.size();
        return a<b;
    });
    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-500);i<min(l+500,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

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Test #1:

score: 100
Accepted
time: 36ms
memory: 166456kb

input:

6
50
8
8
5
72
354224848179261915070

output:

4

result:

ok 1 number(s): "4"

Test #2:

score: -100
Wrong Answer
time: 60ms
memory: 172608kb

input:

28
200878223506436882933619847964496455022155117513398820563747455993172799881403389571477889821109288771413214004090719097929400406252135763028179112130390003528046316900603668569910008417315162907579003880220844686222148696041857432602133894827753998572080650383305777912447151917272483538029469449...

output:

0

result:

wrong answer 1st numbers differ - expected: '27', found: '0'