Submission #671606

#	Time	Username	Problem	Language	Result	Execution time	Memory
671606		MohammadAghil	Jakarta Skyscrapers (APIO15_skyscraper)	C++17	57 / 100	1092 ms	45560 KiB

skyscraper

      #include <bits/stdc++.h>
//   #pragma GCC optimize ("Ofast,unroll-loops")
// #pragma GCC target ("avx2")
 using namespace std;
  typedef long long ll;
   typedef pair<int, int> pp;
     #define per(i,r,l) for(int i = (r); i >= (l); i--)
       #define rep(i,l,r) for(int i = (l); i < (r); i++)
          #define all(x) begin(x), end(x)
             #define sz(x) (int)(x).size()
                 #define pb push_back
                     #define ss second
                          #define ff first
                                  void err(istringstream *iss){}template<typename T,typename ...Args> void err(istringstream *iss,const T &_val, const Args&...args){string _name;*iss>>_name;if(_name.back()==',')_name.pop_back();cerr<<_name<<" = "<<_val<<", ",err(iss,args...);}
void IOS(){
     cin.tie(0) -> sync_with_stdio(0);
     #ifndef ONLINE_JUDGE
          #define er(args ...) cerr << __LINE__ << ": ", err(new istringstream(string(#args)), args), cerr << endl
     #else
          #define er(args ...) 0
     #endif
}
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const ll mod = 1e9 + 7, maxn = 3e4 + 5, lg = 22, inf = ll(1e9) + 5;
ll pw(ll a,ll b,ll md=mod){if(!b)return 1;ll k=pw(a,b>>1ll,md);return k*k%md*(b&1ll?a:1)%md;}

vector<int> dog[maxn];
map<pp, int> dist;
bool vis[maxn];

int main(){ IOS();
     int n, m; cin >> n >> m;
     map<pp, vector<int>> is;
     pp bg, en;
     rep(i,0,m){
          int x, p; cin >> x >> p;
          if(!i) bg = {x, p};
          if(i == 1) en = {x, p};
          dog[x].pb(p);
     }
     deque<pp> q;
     q.pb({bg});
     dist[bg] = 0;
     while(sz(q)){
          auto[x, p] = q.front(); q.pop_front();
          auto add = [&](int x2, int p2, bool bk){
               if(x2 > -1 && x2 < n && !dist.count({x2, p2})){
                    dist[{x2, p2}] = dist[{x, p}] + bk;
                    if(bk) q.pb({x2, p2});
                    else q.push_front({x2, p2});
               }
          };
          if(!vis[x]){
               for(int r: dog[x]){
                    add(x, r, false);
               }
          }
          vis[x] = true;
          add(x+p, p, true), add(x-p, p, true);
     }
     cout << (dist.count(en)? dist[en]: -1) << '\n';
     return 0-0;
}

• Subtask 1: 10 / 10
• Subtask 2: 12 / 12
• Subtask 3: 14 / 14
• Subtask 4: 21 / 21
• Subtask 5: 0 / 43