#include "fish.h"
#include <bits/stdc++.h>
#include <vector>
using namespace std;
const long long inf = (long long) 1e18;
long long max_weights(int n, int m, vector<int> x, vector<int> y, vector<int> w) {
vector<vector<int>> a(n + 1, vector<int>(9));
for (int i = 0; i < m; i++) {
a[x[i] + 1][y[i]] = w[i];
}
vector<vector<long long>> pref(n + 1, vector<long long>(10));
for (int i = 1; i <= n; i++) {
for (int j = 1; j < 10; j++) {
pref[i][j] = pref[i][j - 1] + a[i][j - 1];
}
}
auto sum = [&](int i, int j, int k) {
if (j > k) {
return 0ll;
}
return pref[i][k + 1] - pref[i][j];
};
vector<vector<vector<long long>>> dp(n + 2, vector<vector<long long>>(9, vector<long long>(9, -inf))); // represents the state of the LAST TWO columns
for (int j = 0; j < 9; j++) {
dp[1][j][0] = 0;
}
for (int i = 2; i <= n + 1; i++) {
for (int j = 0; j < 9; j++) {
for (int k = 0; k < 9; k++) {
for (int l = 0; l < 9; l++) {
dp[i][j][k] = max(dp[i][j][k], dp[i - 1][k][l] + sum(i - 1, k + 1, max(j, l)));
}
}
}
}
return *max_element(dp[n + 1][0].begin(), dp[n + 1][0].end());
}
