貌似数组开小了。
by KAqwq @ 2023-08-21 10:21:06
@[KAqwq](/user/448018) OK，谢谢，我改一下
by IKUN_LMX @ 2023-08-21 10:22:23
@[KAqwq](/user/448018) 开小了就re，开大了就超时TAT
by IKUN_LMX @ 2023-08-21 10:25:00
```cpp
#include<bits/stdc++.h>
using namespace std;
const int N=1e7;
int sum[N];
int main(){
sum[0]=0;
sum[1]=1;
long long n;
long long m;
cin>>m;
for(int i=2;i<1e7 ;i++){
sum[i]=(sum[i-1]+sum[i-2])%m;
}
for(int i=1;i>0;i++){
if(sum[i]%m==0&&sum[i+1]%m==1){
cout<<i<<endl;
return 0;
}
}
}
```
@[IKUN_LMX](/user/947040)
改成这样就好了
by Ar_cher @ 2023-08-21 10:31:05
@[YoudaFarmer](/user/471767) 谢谢谢谢
by IKUN_LMX @ 2023-08-21 10:31:47
```
#include<bits/stdc++.h>
using namespace std;
long long a[10000000];
long long m;
int main(){
ios::sync_with_stdio(false);
cin>>m;
a[0]=0;
a[1]=1;
for(int i=2;i<=m*m;i++){
a[i]=(a[i-1]+a[i-2])%m;
if(a[i]==1&&a[i-1]==0){
cout<<i-1<<endl;
return 0;
}
}
return 0;
}
```
by unhappysheep @ 2023-08-21 10:38:27
感谢大家，已经AC，谢谢
by IKUN_LMX @ 2023-08-21 10:38:52