#include "fish.h"
#include <bits/stdc++.h>
using ll = long long;
using namespace std;
long long max_weights(int n, int m, vector<int> x, vector<int> y, vector<int> w) {
vector<ll> a(n + 1);
for (int i = 0; i < w.size(); i++) {
a[x[i]] = w[i];
}
vector<vector<ll>> dp(n + 1, vector<ll>(2));
// 0 - empty , 1 - block
dp[0][1] = 0;
dp[0][0] = 0;
dp[1][0] = a[1];
dp[1][1] = a[0];
for (int i = 2; i <= n; i++) {
dp[i][0] = max(dp[i][0], dp[i - 1][0]);
dp[i][0] = max(dp[i][0], dp[i - 1][1] + a[i]);
dp[i][1] = max(dp[i][1], dp[i - 1][1]);
dp[i][1] = max(dp[i][1], dp[i - 2][1] + a[i - 1]);
dp[i][1] = max(dp[i][1], dp[i - 2][0] + a[i - 1]);
}
return max(dp[n][0], dp[n][1]);
};
