#include <bits/stdc++.h>
#include <reverse.h>
#define pb push_back
#define rs resize
#define debug printf("Hello\n")
#define Pi 3.141592653589793
#define sz(a) ll((a).size())
#define all(x) (x).begin(), (x).end()
#define fastio ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)
#define endl "\n"
#define mp make_pair
#define f first
#define s second
#define vt vector
#define rst(a,b) memset((a),(b), sizeof(a))
#define FOR(a, b, c) for (ll a = (b); (a) < (c); ++(a))
#define FORE(a, b, c) for (ll a = (b); (a) <= (c); ++(a))
#define FORR(a, b, c) for (ll a = (b); (a) >= (c); --(a))
#define umap unordered_map
#define len(a) (a).length()
#define pqueue priority_queue
using namespace std;
using vi = vector<int>;
using ui = unsigned int;
using ll = long long;
using pll = pair<ll,ll>;
using vll = vector<ll>;
using ull = unsigned long long;
using pii = pair<int, int>;
ll e(ll base, ll pwr, ll mm = LLONG_MAX){
if(pwr == 1) return base%mm;;
if(pwr == 0) return 1;
if(pwr % 2 == 1){
ull t = e(base, (pwr-1)/2,mm)%mm;
return (t*t)%mm*base%mm ;
}
if(pwr % 2 == 0){
ull t = e(base, pwr/2, mm)%mm;
return (t*t)%mm;
}
return 0;
}
ll flt(ll a, ll p){
return e(a,p-2,p);
}
ll combination(ll n, ll r){
if(r>n/2)return combination (n,n-r);
ll k=1;
for(ll x=n,j=1;x>n-r||j<=r;--x,++j){
if(x>n-r)k*=x;
if(j<=r)k/=j;
}
return k;
}
vector<ll> getFactor(ll n){
vector<ll> tmp;
vector<ll> ans;
if(n == 1)return vt<ll>{1};
else if(n==2) return vt<ll> {1,2};
for(ll i = 1;i<=ceil(sqrt(n));++i){
if(!(n%i)){
ans.pb(i);
if(i!=n/i && abs(i-(n/i)) != 1)tmp.pb(n/i);
}
}
for(ll i=tmp.size()-1;i>-1;--i){
ans.pb(tmp[i]);
}
return ans;
}
bool isPrime(ll n) {if(n == 1)return 0;for(ll i = 2;i*i <= n;++i){if(!(n%i))return 0;}return 1;}
const int dx[4] = {0,0,-1,1};
const int dy[4] = {1,-1,0,0};
const char dir[4] = {'R', 'L', 'U', 'D'};
const int mod = 1e9+7;
const int inf = 0x3f3f3f3f;
const ll INF = 0x3f3f3f3f3f3f3f3f;
std::vt<ll> reverse(vt<ll> a){
reverse(all(a));
return a;
}
int main(){
fastio;
#ifndef ONLINE_JUDGE
freopen("input.txt", "r", stdin);
freopen("output.txt", "w", stdout);
#endif
}
Compilation message
reverse.cpp: In function 'int main()':
reverse.cpp:97:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
97 | freopen("input.txt", "r", stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
reverse.cpp:98:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
98 | freopen("output.txt", "w", stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/bin/ld: /tmp/ccpcrOwv.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/cc3RZtix.o:reverse.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status
