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Submission #541927

# Submission time Handle Problem Language Result Execution time Memory
541927 2022-03-24T20:26:23 Z farhan132 Jakarta Skyscrapers (APIO15_skyscraper) C++17
10 / 100
 101 ms 262144 KB 
/***Farhan132***/
//#pragma GCC optimize("Ofast")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,fma")
//#pragma GCC optimization ("unroll-loops")
//#pragma GCC optimize("Ofast,fast-math")


#include <bits/stdc++.h>
 
 
 
using namespace std;

typedef int ll;
typedef unsigned long long ull;
typedef double dd;
typedef vector<ll> vll;
typedef pair<ll , ll> ii;
typedef vector< ii > vii;
typedef pair < pair < ll , ll > , pair < ll , ll > > cm; 
typedef tuple < ll, ll, ll > tp;

#define ff first
#define ss second
#define pb push_back
#define in insert
#define f0(b) for(int i=0;i<(b);i++)
#define f00(b) for(int j=0;j<(b);j++)
#define f1(b) for(int i=1;i<=(b);i++)
#define f11(b) for(int j=1;j<=(b);j++)
#define f2(a,b) for(int i=(a);i<=(b);i++)
#define f22(a,b) for(int j=(a);j<=(b);j++)
#define sf(a) scanf("%lld",&a)
#define sff(a,b) scanf("%lld %lld", &a , &b)
#define pf(a) printf("%lld\n",a)
#define pff(a,b) printf("%lld %lld\n", a , b)
#define bug printf("**!\n")
#define mem(a , b) memset(a, b ,sizeof(a))
#define front_zero(n) __builtin_clzll(n)
#define back_zero(n) __builtin_ctzll(n)
#define total_one(n) __builtin_popcount(n)
#define clean fflush(stdout)
 
//const ll mod =  (ll) 998244353;
const ll mod =  (ll) 1e9 + 7;
const ll maxn = (ll)1e8 + 5;
const int nnn = 1048590;
const int inf = numeric_limits<int>::max()-1;
//const ll INF = numeric_limits<ll>::max()-1;
const ll INF = (ll)1e18;
 
ll dx[]={0,1,0,-1};
ll dy[]={1,0,-1,0};
ll dxx[]={0,1,0,-1,1,1,-1,-1};
ll dyy[]={1,0,-1,0,1,-1,1,-1};
 
bool USACO = 0;
 
mt19937 rng(chrono::system_clock::now().time_since_epoch().count());
 
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
 
template <typename T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;

const ll N = 3e4 + 5;

vector < ll > g[N];

vector < ll > dp[N], car[N];

unordered_map < ll , ll > mp[N];

void solve(){

  ll n , m;
  cin >> n >> m;

  ll a , b;
  vector < ii > v;

  

  for(ll i = 0; i < m; i++){
    ll x , p; cin >> x >> p;
    g[x].pb(p);
    if(i == 0) a = x;
    if(i == 1) b = x;
    v.pb({p , x % p});
  }
  sort(v.begin(), v.end());
  v.erase(unique(v.begin(), v.end()) , v.end());


  car[a].pb(0);

  for(auto [c , j] : v){
    for(ll i = j; i < n; i += c) car[i].pb(c);
  }


  for(ll i = 0; i < n; i++){
    ll sz = car[i].size() + 1;
    ll mx = log2(sz) + 1;
    mp[i].reserve(1 << sz);
    mp[i].max_load_factor(0.25);
    ll k = 0;
    for(auto u : car[i]) mp[i][u] = k, k++;
    dp[i].resize(car[i].size(), -1);
  }

  queue < tp > p;

  p.push({0, a, 0});

  dp[a][0] = 0;

  while(p.size()){
    auto [cost , pos , extra] = p.front(); p.pop();
    g[pos].pb(car[pos][extra]);
    if(pos == b){
      cout << cost << '\n';
      return;
    }
    for(auto u : g[pos]){
      if(!u) continue;
      if(pos - u >= 0){
        ll c1 = pos - u;
        //ll c2 = lower_bound(car[c1].begin(), car[c1].end(), u) - car[c1].begin();
        ll c2 = mp[c1][u];
        if(dp[c1][c2] == -1){
         dp[c1][c2] = cost + 1;
         p.push({cost + 1, c1 , c2});
        }
      }
      if(pos + u < n){
        ll c1 = pos + u;
        //ll c2 = lower_bound(car[c1].begin(), car[c1].end(), u) - car[c1].begin();
        ll c2 = mp[c1][u];
        if(dp[c1][c2] == -1){
         dp[c1][c2] = cost + 1;
         p.push({cost + 1, c1 , c2});
        }
      }
    }
    g[pos].pop_back();
  }

  cout << "-1\n";


   
   return;
}
 
int main() {
    
    
    #ifdef LOCAL
        freopen("in", "r", stdin);
        freopen("out", "w", stdout);
        auto start_time = clock();
    #else 
       ios_base::sync_with_stdio(0); cin.tie(NULL); cout.tie(NULL);
    #endif

    //pre();

    ll T = 1, CT = 0; // cin >> T;

    while(T--){
        // cout << "Case #" << ++CT <<": " ;
        solve();
    }
    #ifdef LOCAL
        auto end_time = clock();
        cerr<< "Execution time: "<<(end_time - start_time)*(int)1e3/CLOCKS_PER_SEC<<" ms\n";
    #endif
 
    return 0;
}

Compilation message

skyscraper.cpp: In function 'void solve()':
skyscraper.cpp:105:8: warning: unused variable 'mx' [-Wunused-variable]
  105 |     ll mx = log2(sz) + 1;
      |        ^~
skyscraper.cpp: In function 'int main()':
skyscraper.cpp:170:15: warning: unused variable 'CT' [-Wunused-variable]
  170 |     ll T = 1, CT = 0; // cin >> T;
      |               ^~
skyscraper.cpp: In function 'void solve()':
skyscraper.cpp:122:5: warning: 'b' may be used uninitialized in this function [-Wmaybe-uninitialized]
  122 |     if(pos == b){
      |     ^~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4052 KB Output is correct
2 Correct 2 ms 4084 KB Output is correct
3 Correct 2 ms 4052 KB Output is correct
4 Correct 2 ms 4052 KB Output is correct
5 Correct 2 ms 4052 KB Output is correct
6 Correct 2 ms 4052 KB Output is correct
7 Correct 2 ms 4052 KB Output is correct

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4052 KB Output is correct
2 Correct 2 ms 4052 KB Output is correct
3 Correct 2 ms 4052 KB Output is correct
4 Correct 3 ms 4052 KB Output is correct
5 Correct 2 ms 4052 KB Output is correct
6 Correct 3 ms 4052 KB Output is correct
7 Correct 3 ms 4052 KB Output is correct
8 Correct 2 ms 4052 KB Output is correct
9 Correct 2 ms 4052 KB Output is correct
10 Runtime error 101 ms 262144 KB Execution killed with signal 9
11 Halted 0 ms 0 KB -

Subtask #3
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4052 KB Output is correct
2 Correct 2 ms 4052 KB Output is correct
3 Correct 3 ms 4080 KB Output is correct
4 Correct 3 ms 4052 KB Output is correct
5 Correct 3 ms 4052 KB Output is correct
6 Correct 3 ms 4080 KB Output is correct
7 Correct 3 ms 4052 KB Output is correct
8 Correct 3 ms 4052 KB Output is correct
9 Correct 2 ms 4080 KB Output is correct
10 Runtime error 96 ms 262144 KB Execution killed with signal 9
11 Halted 0 ms 0 KB -

Subtask #4
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4052 KB Output is correct
2 Correct 2 ms 4052 KB Output is correct
3 Correct 2 ms 4052 KB Output is correct
4 Correct 2 ms 4052 KB Output is correct
5 Correct 2 ms 4052 KB Output is correct
6 Correct 3 ms 4080 KB Output is correct
7 Correct 2 ms 4052 KB Output is correct
8 Correct 3 ms 4052 KB Output is correct
9 Correct 2 ms 4052 KB Output is correct
10 Runtime error 97 ms 262144 KB Execution killed with signal 9
11 Halted 0 ms 0 KB -

Subtask #5
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4052 KB Output is correct
2 Correct 2 ms 4052 KB Output is correct
3 Correct 2 ms 4052 KB Output is correct
4 Correct 3 ms 4052 KB Output is correct
5 Correct 2 ms 4052 KB Output is correct
6 Correct 2 ms 4080 KB Output is correct
7 Correct 3 ms 4044 KB Output is correct
8 Correct 3 ms 4052 KB Output is correct
9 Correct 3 ms 4084 KB Output is correct
10 Runtime error 101 ms 262144 KB Execution killed with signal 9
11 Halted 0 ms 0 KB -