哪里错了
#include<bits/stdc++.h>
using namespace std;
long long a[50];
int main()
{
int n;
cin >> n;
a[1] = 1;
a[2] = 2;
for(int i = 3; i <= 50; i++)
{
a[i] = a[i - 2] + a[i - 1];
}
cout << a[n] << endl;
return 0;
}
using namespace std;
long long a[50];
int main()
{
int n;
cin >> n;
a[1] = 1;
a[2] = 2;
for(int i = 3; i <= 50; i++)
{
a[i] = a[i - 2] + a[i - 1];
}
cout << a[n] << endl;
return 0;
}
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