Submission #584343

#	Time	Username	Problem	Language	Result	Execution time	Memory
584343		drdilyor	Skyscraper (JOI16_skyscraper)	C++17	5 / 100	2085 ms	212 KiB

skyscraper

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/detail/standard_policies.hpp>
#ifdef ONPC
    #include "t_debug.cpp"
#else
    #define debug(...) 42
#endif
#define allit(a) (a).begin(), (a).end()
#define sz(a) ((int) (a).size())
#define cut(s) {cout << s << '\n'; return 0;}

using namespace std;
using ll = long long;
using vi = vector<int>;
namespace pd = __gnu_pbds;
template<typename K> using ordered_set = pd::tree<K, pd::null_type, less<K>, pd::rb_tree_tag, pd::tree_order_statistics_node_update>;
template<typename... T> using hash_table = pd::gp_hash_table<T...>;

const int INF = 1e9;
const ll INFL = 1e18;
const int N = 1e5;
const int RANDOM = chrono::high_resolution_clock::now().time_since_epoch().count();
mt19937 rng(RANDOM);

int solve() {
    int n, l;
    cin >> n >> l;
    vi a(n);
    for (auto& i : a) cin >> i;

    vi cur, taken(n, 0);
    ll res = 0;
    function<void()> brute = [&]() {
        if (cur.size() == n) {
            int cost = 0;
            for (int i = 1; i < n; i++) {
                cost += abs(cur[i] - cur[i-1]);
            }
            debug(cur, cost);
            if (cost <= l) res++;
        } else {
            for (int i = 0; i < n; i++) {
                if (!taken[i]) {
                    taken[i] = 1;
                    cur.push_back(a[i]);
                    brute();
                    cur.pop_back();
                    taken[i] = 0;
                }
            }
        }
    };
    brute();
    cout << res << '\n';
    return 0;
}

signed main() {
    cin.tie(0)->sync_with_stdio(0);
    int t = 1;
    //cin >> t;
    while (t-- && cin) {
        if (solve()) break;
        #ifdef ONPC
            cout << "____________________" << endl;
        #endif
    }
    return 0;
}

Compilation message (stderr)

skyscraper.cpp: In lambda function:
skyscraper.cpp:35:24: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   35 |         if (cur.size() == n) {
      |             ~~~~~~~~~~~^~~~
skyscraper.cpp:7:24: warning: statement has no effect [-Wunused-value]
    7 |     #define debug(...) 42
      |                        ^~
skyscraper.cpp:40:13: note: in expansion of macro 'debug'
   40 |             debug(cur, cost);
      |             ^~~~~

• Subtask 1: 5 / 5
• Subtask 2: 0 / 15
• Subtask 3: 0 / 80