Submission #1068735

#	Time	Username	Problem	Language	Result	Execution time	Memory
1068735		cpdreamer	Fibonacci representations (CEOI18_fib)	C++17	0 / 100	67 ms	848 KiB

fib

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <utility>
#define V vector
#define F first
#define S second
#define P pair
#define pb push_back
#define all(v) v.begin(),v.end()
typedef long long ll;
using namespace __gnu_pbds;
using namespace std;
typedef tree<int,null_type,less<int>,rb_tree_tag,
        tree_order_statistics_node_update> indexed_set;
static int called = 0;const long long MOD = 1e9+7; // 1e9 + 7

void file(){
    freopen("input.txt.txt","r",stdin);
    freopen("output.txt.txt","w",stdout);
}
ll binary_expo(ll a,ll b,ll m){
    ll res=1;
    while(b){
        if(b%2==1){res=(res*a)%m;b--;}
        b/=2;
        a=(a*a)%m;
    }
    return res%m;
}
set<map<int,int>>st1;
set<map<int,int>>st;
bool prime(ll p){
    for(int i=0;i<500;i++) {
        ll b = rand()%p;
        if(b!=0) {
            ll res = binary_expo(b, p, p);
            if (res != b % p)
                return false;
        }
    }
    return true;
}
void  solve() {
    int n;
    cin>>n;
    int A[n];
    for(int i=0;i<n;i++)
        cin>>A[i];
    int c=0;
    for(int i=0;i<n;i++){
        if(A[i]!=1)
            c++;
        cout<<binary_expo(2,c,MOD)<<endl;
    }
}
int main(){
    file();
    solve();
}

Compilation message (stderr)

fib.cpp: In function 'void file()':
fib.cpp:18:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |     freopen("input.txt.txt","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
fib.cpp:19:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   19 |     freopen("output.txt.txt","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fib.cpp: At global scope:
fib.cpp:15:12: warning: 'called' defined but not used [-Wunused-variable]
   15 | static int called = 0;const long long MOD = 1e9+7; // 1e9 + 7
      |            ^~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 20
• Subtask 3: 0 / 15
• Subtask 4: 0 / 10
• Subtask 5: 0 / 15
• Subtask 6: 0 / 35