Submission #586862

#	Time	Username	Problem	Language	Result	Execution time	Memory
586862		MohammadAghil	File Paths (BOI15_fil)	C++17	0 / 100	24 ms	27712 KiB

fil

      #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 er(args ...) cerr << __LINE__ << ": ", err(new istringstream(string(#args)), args), cerr << endl
      #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
     //      freopen("in.in", "r", stdin);
     //      freopen("out.out", "w", stdout);
     // #endif
}
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const ll mod = 1e9 + 7, maxn = 6e3 + 5, maxk = 1e6 + 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);return k*k%md*(b&1ll?a:1)%md;}

int l[maxn], par[maxn], n, m, k, s;
vector<int> adj[maxn];
int vl[maxk];
bool ans[maxn];
vector<int> dv[maxk];

void add(int u){
     int cr = s;
     while(u + 1){
          vl[cr]++;
          cr += l[u], u = par[u];
     }
}

void del(int u){
     int cr = s;
     while(u + 1){
          vl[cr]--;
          cr += l[u], u = par[u];
     }
}

void dfs(int r, int h = 0){
     if(r > n){
          int t = k - h;
          ans[r-n] = t == 0;
          if(t > 0){
               for(int j = 1; j*j <= t; j++){
                    if(t%j == 0){
                         if(vl[j] || vl[t/j]){
                              ans[r-n] = true;
                              break;
                         }
                    }
               }
          }
     }else{
          add(r);
          for(int c: adj[r]) dfs(c, h + l[c]);
          del(r);
     }
}

int main(){ IOS();
     // rep(i,1,maxk) for(int j = i; j < maxk; j += i) dv[j].pb(i);
     par[0] = -1;
     cin >> n >> m >> k >> s; s++;
     rep(i,1,n+m+1) cin >> par[i] >> l[i], adj[par[i]].pb(i), l[i]++;
     dfs(0);
     rep(i,1,m+1) cout << (ans[i]?"YES\n":"NO\n");
     return 0; 
}

• Subtask 1: 0 / 33
• Subtask 2: 0 / 33
• Subtask 3: 0 / 34