#include "fish.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
ll p2(int n, int m, vector<int> x, vector<int> y, vector<int> w) {
vector<int> a(n,0), b(n,0);
ll sum=0;
for (int i=0; i<m; ++i) {
if (x[i]==0) a[y[i]]=w[i];
else b[y[i]]=w[i];
sum+=w[i];
}
ll ans=0;
for (int i=0; i<n; ++i) ans+=b[i];
if (n==2) return max(ans,sum-ans);
ll cnt=ans;
for (int i=0; i<n; ++i) {
cnt+=1ll*a[i]-1ll*b[i];
ans=max(ans,cnt);
}
return ans;
}
ll p3(int n, int m, vector<int> x, vector<int> w) {
vector<int> a(n,0);
for (int i=0; i<m; ++i) a[x[i]]=w[i];
vector<vector<int>> dp(n+1,vector<int>(2,0));
dp[1]={a[1],0};
for (int i=2; i<=n; ++i) {
dp[i] = {dp[i-2][1]+a[i]+a[i-2], max(dp[i-1][0],dp[i-1][1])};
}
return max(dp[n][0],dp[n][1]);
}
ll max_weights(int n, int m, vector<int> x, vector<int> y, vector<int> w) {
int _p1=1, _p2=1, _p3=1;
ll sum=0;
for (int i=0; i<m; ++i) {
_p1&=!(x[i]&1);
_p2&=(x[i]<=1);
_p3&=(y[i]==0);
sum+=w[i];
}
if (_p1) return sum;
if (_p2) return p2(n,m,x,y,w);
if (_p3) return p3(n,m,x,w);
}
