제출 #717152

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
717152		arush_agu	Jakarta Skyscrapers (APIO15_skyscraper)	C++17	100 / 100	240 ms	12828 KiB

skyscraper

#include <algorithm>
#include <cctype>
#include <cmath>
#include <cstdio>
#include <cstring>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <functional>
#include <iomanip>
#include <iostream>
#include <iterator>
#include <list>
#include <map>
#include <numeric>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <vector>

#ifdef DEBUG
#include <time.h>
#endif

#define all(a) (a).begin(), (a).end()
#define rev(a) (a).rbegin(), (a).rend()
#define F first
#define S second
int recur_depth = 0;
#ifdef DEBUG
#define dbg(x)                                                                 \
  {                                                                            \
    ++recur_depth;                                                             \
    auto x_ = x;                                                               \
    --recur_depth;                                                             \
    cerr << string(recur_depth, '\t') << "\e[91m" << __func__ << ":"           \
         << __LINE__ << "\t" << #x << " = " << x_ << "\e[39m" << endl;         \
  }
#else
#define dbg(x)
#endif

using namespace std;
using namespace __gnu_pbds;

typedef pair<int, int> ii;

typedef long long ll;
typedef long double ld;
typedef pair<ll, ll> llll;

typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<pair<int, int>> vii;
typedef vector<vii> vvii;

typedef vector<ll> vl;
typedef vector<vl> vvl;
typedef vector<pair<ll, ll>> vll;
typedef vector<vll> vvll;

typedef vector<bool> vb;

template <class type1>
using ordered_set = tree<type1, null_type, less<type1>, rb_tree_tag,
                         tree_order_statistics_node_update>;

template <typename A, typename B>
ostream &operator<<(ostream &os, const pair<A, B> &p) {
  return os << '(' << p.first << ", " << p.second << ')';
}
template <typename T_container, typename T = typename enable_if<
                                    !is_same<T_container, string>::value,
                                    typename T_container::value_type>::type>
ostream &operator<<(ostream &os, const T_container &v) {
  os << '{';
  string sep;
  for (const T &x : v)
    os << sep << x, sep = ", ";
  return os << '}';
}

const ll MOD = 1e9 + 7;
// const ll MOD = 998244353;
const ll INF = 1e9 + 10;
const ld EPS = 1e-9;

const int SQRTN = 40;

// Saw Solution

void solve() {
  int n, m; cin >> n >> m;
  vii ds(m); for (auto &[b, p] : ds) cin >> b >> p;

  vvi bds(n); for (auto &[b, p] : ds) bds[b].push_back(p);
  for (int i=0; i<n; i++) sort(all(bds[i]));

  int source = ds[0].first, target = ds[1].first;
  vvi dist(n, vi(SQRTN, INF));
  vector<vb> vis(n, vb(SQRTN));
  
  dist[source][0] = 0;

  typedef pair<int, ii> T;
  priority_queue<T, vector<T>, greater<T>> pq; pq.push({0, {source, 0}});

  auto add = [&](int b, int p, int d) {
    if (dist[b][p] > d) {
      dist[b][p] = d;
      pq.push({d, {b, p}});
    }
  };

  while (!pq.empty()) {
    auto [dist, bbpp] = pq.top(); pq.pop();
    auto [bb, pp] = bbpp;

    if (vis[bb][pp]) continue;
    vis[bb][pp] = 1;

    add(bb, 0, dist);
    if (pp == 0) {
      for (auto np : bds[bb]) {
        if (np < SQRTN) {
          add(bb, np, dist);
          continue;
        }
        for (int j = bb % np; j < n; j += np)
          add(j, 0, dist + abs(bb - j) / np);
      }
    } else {
        if (bb >= pp)
          add(bb - pp, pp, dist + 1);
        if (bb + pp < n)
          add(bb + pp, pp, dist + 1);
    }
  }

  cout << (dist[target][0] >= INF ? -1 : dist[target][0]) << "\n";
}

int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(NULL);

  clock_t start = clock();
  int test_cases = 1;

  /* cin >> test_cases; */

  while (test_cases--)
    solve();

#ifdef DEBUG
  cerr << fixed << setprecision(10)
       << "\nTime Taken: " << (double)(clock() - start) / CLOCKS_PER_SEC
       << "s\n";
#endif
  return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

skyscraper.cpp: In function 'int main()':
skyscraper.cpp:150:11: warning: unused variable 'start' [-Wunused-variable]
  150 |   clock_t start = clock();
      |           ^~~~~

• Subtask 1: 10 / 10
• Subtask 2: 12 / 12
• Subtask 3: 14 / 14
• Subtask 4: 21 / 21
• Subtask 5: 43 / 43