oj.uz

Submission #229906

# Submission time Handle Problem Language Result Execution time Memory
229906 2020-05-07T05:44:05 Z caoash Dreaming (IOI13_dreaming) C++17
18 / 100
 85 ms 29048 KB 
#pragma GCC target ("sse4")

#include <bits/stdc++.h>
#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/tree_policy.hpp>
#include "dreaming.h"

using namespace std;
using namespace __gnu_pbds;
 
typedef long long ll;
typedef long double ld;
typedef complex<ld> cd;

typedef pair<int, int> pi;
typedef pair<ll,ll> pl;
typedef pair<ld,ld> pd;
typedef pair<int, pi> pii;

typedef vector<int> vi;
typedef vector<ld> vd;
typedef vector<ll> vl;
typedef vector<pi> vpi;
typedef vector<pl> vpl;
typedef vector<cd> vcd;

#define fax(i, a) for (int i = 0; i < (a); i++)
#define f0x(i, a, b) for (int i = (a); i < (b); i++)
#define f0xd(i,a,b) for (int i = (b)-1; i >= (a); i--)
#define faxd(i,a) for (int i = (a)-1; i >= 0; i--)
#define trav(a, x) for (auto& a : x)
#define memeset memset

#define mp make_pair
#define pb push_back
#define f first
#define s second
#define lb lower_bound
#define ub upper_bound

#define sz(x) (int)x.size()
#define all(x) begin(x), end(x)
#define rsz resize

template<class T> void ckmin(T &a, T b) { a = min(a, b); }
template<class T> void ckmax(T &a, T b) { a = max(a, b); }

template <class T, int ...Ns> struct BIT {
    T val = 0;
    void upd(T v) { val += v; }
    T query() { return val; }
};
 
template <class T, int N, int... Ns> struct BIT<T, N, Ns...> {
    BIT<T,Ns...> bit[N + 1];
    template<typename... Args> void upd(int pos, Args... args) {
        for (; pos <= N; pos += (pos&-pos)) bit[pos].upd(args...);
    }
    template<typename... Args> T sum(int r, Args... args) {
        T res = 0; for (; r; r -= (r&-r)) res += bit[r].query(args...); 
        return res;
    }
    template<typename... Args> T query(int l, int r, Args... args) {
        return sum(r,args...)-sum(l-1,args...);
    }
};

namespace input {
    template<class T> void re(complex<T>& x);
    template<class T1, class T2> void re(pair<T1,T2>& p);
    template<class T> void re(vector<T>& a);
    template<class T, size_t SZ> void re(array<T,SZ>& a);

    template<class T> void re(T& x) { cin >> x; }
    void re(double& x) { string t; re(t); x = stod(t); }
    void re(ld& x) { string t; re(t); x = stold(t); }
    template<class T, class... Ts> void re(T& t, Ts&... ts) { 
        re(t); re(ts...); 
    }

    template<class T> void re(complex<T>& x) { T a,b; re(a,b); x = cd(a,b); }
    template<class T1, class T2> void re(pair<T1,T2>& p) { re(p.f,p.s); }
    template<class T> void re(vector<T>& a) { fax(i,sz(a)) re(a[i]); }
    template<class T, size_t SZ> void re(array<T,SZ>& a) { fax(i,SZ) re(a[i]); }
}

using namespace input;

namespace output {
    void pr(int x) { cout << x; }
    void pr(long x) { cout << x; }
    void pr(ll x) { cout << x; }
    void pr(unsigned x) { cout << x; }
    void pr(unsigned long x) { cout << x; }
    void pr(unsigned long long x) { cout << x; }
    void pr(float x) { cout << x; }
    void pr(double x) { cout << x; }
    void pr(ld x) { cout << x; }
    void pr(char x) { cout << x; }
    void pr(const char* x) { cout << x; }
    void pr(const string& x) { cout << x; }
    void pr(bool x) { pr(x ? "true" : "false"); }
    
    template<class T1, class T2> void pr(const pair<T1,T2>& x);
    template<class T> void pr(const T& x);
    
    template<class T, class... Ts> void pr(const T& t, const Ts&... ts) { 
        pr(t); pr(ts...); 
    }
    template<class T1, class T2> void pr(const pair<T1,T2>& x) { 
        pr("{",x.f,", ",x.s,"}"); 
    }
    template<class T> void pr(const T& x) { 
        pr("{"); // const iterator needed for vector<bool>
        bool fst = 1; for (const auto& a: x) pr(!fst?", ":"",a), fst = 0; 
        pr("}");
    }
    
    void ps() { pr("\n"); } // print w/ spaces
    template<class T, class... Ts> void ps(const T& t, const Ts&... ts) { 
        pr(t); if (sizeof...(ts)) pr(" "); ps(ts...); 
    }
    
    void pc() { pr("]\n"); } // debug w/ commas
    template<class T, class... Ts> void pc(const T& t, const Ts&... ts) { 
        pr(t); if (sizeof...(ts)) pr(", "); pc(ts...); 
    }
    #define dbg(x...) pr("[",#x,"] = ["), pc(x);
}

using namespace output;

namespace io {
    void setIn(string s) { freopen(s.c_str(),"r",stdin); }
    void setOut(string s) { freopen(s.c_str(),"w",stdout); }
    void setIO(string s = "") {
        ios_base::sync_with_stdio(0); cin.tie(0); // fast I/O
        if (sz(s)) { setIn(s+".in"), setOut(s+".out"); } // for USACO
    }
}

using namespace io;

mt19937 rnd(chrono::high_resolution_clock::now().time_since_epoch().count());

const int MOD = 1000000007; // 998244353
const ll INF = 1e18;
const int MX = 200005;
const ld PI = 4*atan((ld)1);

vpi adj[MX]; int dp1[MX], dp2[MX], ans[MX], val[MX], par[MX];

void dfs1(int v, int p){
   for(pi to : adj[v]){
      if(to.f != p){
         dfs1(to.f, v);
         dp1[v] = max(dp1[v], dp1[to.f]+to.s);
         val[to.f] = to.s;
         par[to.f] = v;
      }
   }
}

void dfs2(int v, int p){
   if(p != -1){
      dp2[v] = max(dp2[v], dp2[p]+val[v]);
      for(pi to2 : adj[p]){
         if(to2.f != v && to2.f != par[p]){
            dp2[v] = max(dp2[v], dp1[to2.f] + val[v] + to2.s);
         }
      }

   }
   for(pi to : adj[v]){
      if(to.f != p){
        dfs2(to.f, v);
      }
   }
}
bool vis[MX];
pi dfs_ans(int v, int p){
   vis[v] = true;
   pi ret = mp(max(dp1[v], dp2[v]), v);
   for(pi to : adj[v]){
      if(to.f != p){
         pi nxt = dfs_ans(to.f, v);
         ckmin(ret, nxt);
      }
   }
   return ret;
}


pi dfs(int v, int p, int d){
   pi best = mp(d,v);
   for(pi to : adj[v]){
     if(to.f != p){ 
        ckmax(best, dfs(to.f, v, d+to.s)); 
     }
   }
   return best;
}
 
int diam(int v, int p){
   pi far = dfs(0,-1, 0);
   return dfs(far.s, -1, 0).f;
}

int travelTime(int N, int M, int L, int a[], int b[], int c[]){
  fax(i,M){
   //dbg(a[i], b[i], c[i]);
   adj[a[i]].pb(mp(b[i],c[i]));
   adj[b[i]].pb(mp(a[i],c[i]));
  }
  vpi roots;
  fax(i,N){
   if(!vis[i]){
     dfs1(i,-1); dfs2(i,-1); 
     pi fin = dfs_ans(i,-1);
     roots.pb(mp(fin.f, fin.s));
   }
  }
  sort(all(roots));
  fax(i,sz(roots)-1){
   int u = roots[sz(roots)-1].f; int v = roots[i].f; int w = L;
   adj[u].pb(mp(v,w));
   adj[v].pb(mp(u,w));
  }
  if(sz(roots) < 3){
     return diam(0,-1);
  }
  else{
     return max(roots[sz(roots)-3].f + roots[sz(roots)-2].f + 2*L, roots[sz(roots)-1].f + roots[sz(roots)-2].f + L);
  }
}

Compilation message

dreaming.cpp: In function 'void io::setIn(std::__cxx11::string)':
dreaming.cpp:134:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
     void setIn(string s) { freopen(s.c_str(),"r",stdin); }
                            ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
dreaming.cpp: In function 'void io::setOut(std::__cxx11::string)':
dreaming.cpp:135:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
     void setOut(string s) { freopen(s.c_str(),"w",stdout); }
                             ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Runtime error 85 ms 29048 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 85 ms 29048 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# Verdict Execution time Memory Grader output
1 Runtime error 85 ms 29048 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 42 ms 10868 KB Output is correct
2 Correct 40 ms 10740 KB Output is correct
3 Correct 39 ms 10740 KB Output is correct
4 Correct 44 ms 10708 KB Output is correct
5 Correct 40 ms 10772 KB Output is correct
6 Correct 42 ms 11640 KB Output is correct
7 Correct 41 ms 10996 KB Output is correct
8 Correct 41 ms 10612 KB Output is correct
9 Correct 39 ms 10584 KB Output is correct
10 Correct 39 ms 10992 KB Output is correct
11 Correct 8 ms 5120 KB Output is correct
12 Correct 28 ms 9716 KB Output is correct
13 Correct 26 ms 9716 KB Output is correct
14 Correct 28 ms 9708 KB Output is correct
15 Correct 27 ms 9716 KB Output is correct
16 Correct 28 ms 9448 KB Output is correct
17 Correct 27 ms 8812 KB Output is correct
18 Correct 26 ms 9844 KB Output is correct
19 Correct 27 ms 9580 KB Output is correct
20 Correct 7 ms 4992 KB Output is correct
21 Correct 8 ms 4992 KB Output is correct
22 Correct 8 ms 5248 KB Output is correct
23 Correct 25 ms 9588 KB Output is correct

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Runtime error 85 ms 29048 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# Verdict Execution time Memory Grader output
1 Runtime error 85 ms 29048 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -