oj.uz

Submission #59751

# Submission time Handle Problem Language Result Execution time Memory
59751 2018-07-23T04:14:16 Z Benq File Paths (BOI15_fil) C++11
33 / 100
 1000 ms 44596 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/assoc_container.hpp>
 
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 vector<int> vi;
typedef vector<ld> vd;
typedef vector<ll> vl;
typedef vector<pi> vpi;
typedef vector<pl> vpl;
typedef vector<cd> vcd;
 
template <class T> using Tree = tree<T, null_type, less<T>, rb_tree_tag,tree_order_statistics_node_update>;
 
#define FOR(i, a, b) for (int i=a; i<(b); i++)
#define F0R(i, a) for (int i=0; i<(a); i++)
#define FORd(i,a,b) for (int i = (b)-1; i >= a; i--)
#define F0Rd(i,a) for (int i = (a)-1; i >= 0; i--)
 
#define sz(x) (int)(x).size()
#define mp make_pair
#define pb push_back
#define f first
#define s second
#define lb lower_bound
#define ub upper_bound
#define all(x) x.begin(), x.end()
 
const int MOD = 1000000007;
const ll INF = 1e18;
const int MX = 6001;
 
int n,m,k,s,p[MX],l[MX];
ll depth[MX];
vi child[MX];
bitset<MX> ans;
bitset<1000001> root;
 
void dfs0(int x, ll cdepth) {
    cdepth += l[x];
    depth[x] = cdepth;
    for (int i: child[x]) dfs0(i,cdepth);
}
 
void genCyc(int x, int ori, ll cdepth, vi& CYC) {
    if (x > n) return;
    if (cdepth <= k) CYC.pb(cdepth);
    for (int i: child[x]) genCyc(i,ori,cdepth+l[i],CYC);
}
 
unordered_map<int,int> cyc;

void DFS(int cur) {
    if (cur > n) {
        ll need = k-depth[cur];
        if (need == 0) {
            ans[cur] = 1;
            return;
        }
        for (int t = 1; t*t <= need; t++) if (need%t == 0) 
            if (cyc.count(t) || cyc.count(need/t)) ans[cur] = 1;
    }
    vi CYC; genCyc(cur,cur,s,CYC);
    for (int i: CYC) cyc[i] ++;
    for (int i: child[cur]) DFS(i);
    for (int i: CYC) {
        cyc[i] --;
        if (cyc[i] == 0) cyc.erase(i);
    }
}
 
void case0() {
    dfs0(0,0);
    DFS(0);
}
 
void case1() {
    F0R(i,n+1) if (depth[i]+s <= k) root[depth[i]+s] = 1;
 
    FOR(i,n+1,n+m+1) {
        vi v = {l[i]};
        int x = p[i];
        while (x) {
            v.pb(v.back()+l[x]);
            x = p[x];
        }
        for (int x: v) if (x <= k && root[k-x]) ans[i] = 1;
    }
}
 
int main() {
    ios_base::sync_with_stdio(0); cin.tie(0);
    cin >> n >> m >> k >> s; s ++;
    FOR(i,1,n+1) {
        cin >> p[i] >> l[i]; l[i] ++;
        child[p[i]].pb(i);
    }
    FOR(i,n+1,n+m+1) {
        cin >> p[i] >> l[i]; l[i] ++;
        child[p[i]].pb(i);
    }
    case0();
    case1();
    FOR(i,n+1,n+m+1) {
        if (ans[i]) cout << "YES";
        else cout << "NO";
        cout << "\n";
    }
}
 
/* Look for:
* the exact constraints (multiple sets are too slow for n=10^6 :( ) 
* special cases (n=1?)
* overflow (ll vs int?)
* array bounds
*/

Subtask #1
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 632 KB Output is correct
2 Correct 6 ms 696 KB Output is correct
3 Correct 5 ms 696 KB Output is correct
4 Correct 29 ms 2780 KB Output is correct
5 Correct 14 ms 2780 KB Output is correct
6 Correct 10 ms 2780 KB Output is correct
7 Correct 76 ms 5588 KB Output is correct
8 Correct 6 ms 5588 KB Output is correct
9 Correct 8 ms 5588 KB Output is correct
10 Correct 2 ms 5588 KB Output is correct
11 Correct 4 ms 5588 KB Output is correct
12 Correct 25 ms 5588 KB Output is correct

Subtask #2
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 5588 KB Output is correct
2 Correct 30 ms 5588 KB Output is correct
3 Correct 25 ms 5588 KB Output is correct
4 Correct 26 ms 5588 KB Output is correct
5 Execution timed out 1080 ms 44596 KB Time limit exceeded
6 Halted 0 ms 0 KB -

Subtask #3
0 / 34.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 632 KB Output is correct
2 Correct 6 ms 696 KB Output is correct
3 Correct 5 ms 696 KB Output is correct
4 Correct 29 ms 2780 KB Output is correct
5 Correct 14 ms 2780 KB Output is correct
6 Correct 10 ms 2780 KB Output is correct
7 Correct 76 ms 5588 KB Output is correct
8 Correct 6 ms 5588 KB Output is correct
9 Correct 8 ms 5588 KB Output is correct
10 Correct 2 ms 5588 KB Output is correct
11 Correct 4 ms 5588 KB Output is correct
12 Correct 25 ms 5588 KB Output is correct
13 Correct 24 ms 5588 KB Output is correct
14 Correct 30 ms 5588 KB Output is correct
15 Correct 25 ms 5588 KB Output is correct
16 Correct 26 ms 5588 KB Output is correct
17 Execution timed out 1080 ms 44596 KB Time limit exceeded
18 Halted 0 ms 0 KB -