#include <bits/stdc++.h>
// #pragma GCC optimize("Ofast")
// #pragma GCC target("avx2")
// #pragma GCC target("popcnt")
using namespace std;
using ll = long long;
using ull = unsigned long long;
using lld = long double;
using vi = vector<int>;
using vll = vector<ll>;
using ii = pair<int,int>;
using pll = pair<ll, ll>;
using vii = vector<ii>;
using vpll = vector<pll>;
#define endl '\n'
#define all(x) x.begin(),x.end()
#define lsb(x) x&(-x)
#define gcd(a,b) __gcd(a,b)
#define sz(x) (int)x.size()
#define mp make_pair
#define pb push_back
#define fi first
#define se second
#define fls cout.flush()
#define fore(i,l,r) for(auto i=l;i<r;i++)
#define fo(i,n) fore(i,0,n)
#define forex(i,r,l) for(auto i=r; i>=l;i--)
#define ffo(i,n) forex(i,n-1,0)
bool cmin(int &a, int b){if(b<a){a=b;return 1;}return 0;}
bool cmax(int &a, int b){if(b>a){a=b;return 1;}return 0;}
void valid(ll in){cout<<((in)?"YES\n":"NO\n");}
ll lcm(ll a, ll b){return (a/gcd(a,b))*b;}
ll gauss(ll n){return (n*(n+1))/2;}
const int N = 1e5 + 7;
// ll dp[N][2], pdp[N];
ll max_weights(int n,int m,vi x,vi y,vi w){
vll arr(n+4, 0), pdp(n+4, 0);
vector<vll> dp(n+4, vll(2, 0));
fo(i, m) {
arr[x[i]+2] = w[i];
}
// pdp[1] = arr[2];
fore(i, 2, n+2) {
dp[i][1] = max(dp[i-1][1], dp[i-2][1] + arr[i-1]);
if(i-3 >= 1)
dp[i][1] = max(dp[i][1], pdp[i-3] + arr[i-1]);
dp[i][0] = pdp[i-1];
pdp[i] = max(dp[i][1] + arr[i+1], pdp[i-1]);
}
return max(dp[n+1][0], dp[n+1][1]);
}
void test_case(){
}
int main(){cin.tie(0)->sync_with_stdio(0);
int t=1;
// cin >> t;
while(t--)test_case();
}
Compilation message
/usr/bin/ld: /tmp/ccgg2uHz.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/cc3L26Qz.o:fish.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status
