# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
235977 | Haunted_Cpp | Salesman (IOI09_salesman) | C++17 | 52 ms | 640 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
/**
* author: Duarte Nobrega
* created: 30.05.2020
**/
#include <bits/stdc++.h>
using namespace std;
const int MAX_FEIRAS = 5e5 + 5;
int dp [MAX_FEIRAS];
tuple<int, int, int> feiras [MAX_FEIRAS];
int main () {
ios::sync_with_stdio(0);
cin.tie(0);
// Solution for 15 points
int n_feiras, descer, subir, inicio;
cin >> n_feiras >> descer >> subir >> inicio;
assert (n_feiras <= 5000);
feiras[0] = make_tuple (0, inicio, 0);
n_feiras++;
for (int i = 1; i < n_feiras; i++) {
int dia, onde, lucro;
cin >> dia >> onde >> lucro;
feiras[i] = make_tuple(dia, onde, lucro);
}
sort (feiras, feiras + n_feiras, [&] ( auto primeiro, auto segundo ) {
return get<0> (primeiro) < get<0> (segundo);
});
auto custo_viagem = [&] ( int st, int et) {
int custo = (st < et ? subir * (et - st) : descer * (st - et) );
return custo;
};
int mx = 0;
dp[0] = 0;
for (int i = 1; i < n_feiras; i++) {
dp[i] = - 1e9;
for (int j = i - 1; j >= 0; j--) {
dp[i] = max (dp[i], dp[j] - custo_viagem (get<1> (feiras[j]), get<1> (feiras[i]) ) + get<2> (feiras[i]) );
}
mx = max (mx, dp[i] - custo_viagem (get<1> (feiras[i]), get<1> (feiras[0])));
}
cout << mx << '\n';
return 0;
}
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