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Submission #584255

# Submission time Handle Problem Language Result Execution time Memory
584255 2022-06-27T05:57:37 Z alirezasamimi100 Event Hopping (BOI22_events) C++17
100 / 100
 174 ms 16516 KB 
/*#pragma GCC optimize("Ofast,unroll-loops")
#pragma comment(linker, "/stack:200000000")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,fma,tune=native")*/
/*#pragma GCC optimize("O2")
#pragma GCC optimize("unroll-loops")
#pragma GCC target("avx,avx2,sse,sse2,fma")*/
#include <bits/stdc++.h>
using namespace std;
using ll=long long int;
using ld=long double;
using pll=pair<ll,ll>;
using pii=pair<int,int>;
using point=complex<double>;
#define F first
#define S second
//#define X real()
//#define Y imag()
#define pb push_back
#define mp make_pair
#define lc v<<1
#define rc v<<1|1
#define fast_io ios::sync_with_stdio(false);cin.tie(nullptr);cout.tie(nullptr)
#define kill(x) cout << x << '\n';exit(0)
#define killshayan kill("done!")
#define killmashtali kill("Hello, World!")
const int N=2e5+10,LN=20,M=1e6+10,SQ=700,BS=737,inf=1.05e9,NSQ=N/SQ+3;
const ll INF=1e18;
const double pi=acos(-1);
const ld ep=1e-7;
const int MH=1000696969,MD=998244353,MOD=1000000007;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
#define ordered_set tree<pii, null_type,greater<pii>, rb_tree_tag,tree_order_statistics_node_update>
ll pow(ll x, ll y, ll mod){
    ll ans=1;
    while (y != 0) {
        if (y & 1) ans = ans * x % mod;
        y >>= 1;
        x = x * x % mod;
    }
    return ans;
}
int n,q,dp[LN][N],L[N],R[N],k;
pii f[N*4];
vector<int> cp;
void build(int v, int l, int r){
    f[v]={inf,inf};
    if(r-l>1){
        int m=(l+r)>>1;
        build(lc,l,m);
        build(rc,m,r);
    }
}
pii get(int v, int l, int r, int tl, int tr){
    if(l>=tr || tl>=r) return {inf,inf};
    if(l>=tl && r<=tr) return f[v];
    int m=(l+r)>>1;
    return min(get(lc,l,m,tl,tr),get(rc,m,r,tl,tr));
}
void upd(int v, int l, int r, int p, pii x){
    if(r-l==1){
        f[v]=min(f[v],x);
        return;
    }
    int m=(l+r)>>1;
    if(p<m) upd(lc,l,m,p,x);
    else upd(rc,m,r,p,x);
    f[v]=min(f[lc],f[rc]);
}
int main(){
    fast_io;
    cin >> n >> q;
    for(int i=1; i<=n; i++){
        cin >> L[i] >> R[i];
        cp.pb(L[i]);
        cp.pb(R[i]);
    }
    sort(cp.begin(),cp.end());
    cp.resize(unique(cp.begin(),cp.end())-cp.begin());
    k=cp.size();
    build(1,1,k+1);
    for(int i=1; i<=n; i++){
        L[i]=lower_bound(cp.begin(),cp.end(),L[i])-cp.begin()+1;
        R[i]=lower_bound(cp.begin(),cp.end(),R[i])-cp.begin()+1;
        upd(1,1,k+1,R[i],{L[i],i});
    }
    for(int i=1; i<=n; i++){
        dp[0][i]=get(1,1,k+1,L[i],R[i]+1).S;
    }
    for(int i=1; i<LN; i++){
        for(int j=1; j<=n; j++){
            dp[i][j]=dp[i-1][dp[i-1][j]];
        }
    }
    for(int i=1; i<=q; i++){
        int s,e,ans=0;
        cin >> s >> e;
        if(s==e){
            cout << 0 << '\n';
            continue;
        }
        if(R[s]>=L[e] && R[s]<=R[e]){
            cout << 1 << '\n';
            continue;
        }
        if(R[s]>R[e]){
            cout << "impossible\n";
            continue;
        }
        for(int j=LN; j--; ){
            if(L[dp[j][e]]>R[s]){
                ans+=(1<<j);
                e=dp[j][e];
            }
        }
        if(ans>n) cout << "impossible\n";
        else cout << ans+2 << '\n';
    }
    return 0;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 125 ms 12744 KB Output is correct
3 Correct 130 ms 13200 KB Output is correct
4 Correct 174 ms 13108 KB Output is correct
5 Correct 142 ms 13088 KB Output is correct
6 Correct 137 ms 13224 KB Output is correct
7 Correct 146 ms 13104 KB Output is correct
8 Correct 155 ms 15776 KB Output is correct
9 Correct 150 ms 15964 KB Output is correct
10 Correct 168 ms 13636 KB Output is correct
11 Correct 153 ms 15712 KB Output is correct
12 Correct 77 ms 13376 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 1 ms 468 KB Output is correct
7 Correct 1 ms 596 KB Output is correct
8 Correct 1 ms 468 KB Output is correct
9 Correct 1 ms 468 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 1 ms 468 KB Output is correct
7 Correct 1 ms 596 KB Output is correct
8 Correct 1 ms 468 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 0 ms 416 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 2 ms 468 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 1 ms 468 KB Output is correct
16 Correct 1 ms 468 KB Output is correct
17 Correct 1 ms 468 KB Output is correct
18 Correct 1 ms 468 KB Output is correct
19 Correct 31 ms 1808 KB Output is correct
20 Correct 41 ms 1624 KB Output is correct
21 Correct 31 ms 1816 KB Output is correct
22 Correct 29 ms 2088 KB Output is correct
23 Correct 25 ms 1976 KB Output is correct
24 Correct 26 ms 2056 KB Output is correct
25 Correct 30 ms 1532 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 1 ms 468 KB Output is correct
7 Correct 1 ms 596 KB Output is correct
8 Correct 1 ms 468 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 1 ms 512 KB Output is correct
13 Correct 1 ms 468 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 1 ms 496 KB Output is correct
16 Correct 2 ms 596 KB Output is correct
17 Correct 1 ms 468 KB Output is correct
18 Correct 1 ms 468 KB Output is correct
19 Correct 100 ms 13476 KB Output is correct
20 Correct 92 ms 12228 KB Output is correct
21 Correct 107 ms 12284 KB Output is correct
22 Correct 99 ms 14300 KB Output is correct
23 Correct 132 ms 14544 KB Output is correct
24 Correct 120 ms 14928 KB Output is correct
25 Correct 27 ms 10044 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 119 ms 12896 KB Output is correct
2 Correct 134 ms 12724 KB Output is correct
3 Correct 171 ms 12944 KB Output is correct
4 Correct 153 ms 15268 KB Output is correct
5 Correct 146 ms 13140 KB Output is correct
6 Correct 154 ms 14988 KB Output is correct
7 Correct 158 ms 14964 KB Output is correct
8 Correct 166 ms 15204 KB Output is correct
9 Correct 117 ms 14320 KB Output is correct
10 Correct 152 ms 14992 KB Output is correct
11 Correct 159 ms 14836 KB Output is correct
12 Correct 149 ms 14608 KB Output is correct

Subtask #6
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 125 ms 12744 KB Output is correct
3 Correct 130 ms 13200 KB Output is correct
4 Correct 174 ms 13108 KB Output is correct
5 Correct 142 ms 13088 KB Output is correct
6 Correct 137 ms 13224 KB Output is correct
7 Correct 146 ms 13104 KB Output is correct
8 Correct 155 ms 15776 KB Output is correct
9 Correct 150 ms 15964 KB Output is correct
10 Correct 168 ms 13636 KB Output is correct
11 Correct 153 ms 15712 KB Output is correct
12 Correct 77 ms 13376 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 1 ms 468 KB Output is correct
16 Correct 1 ms 468 KB Output is correct
17 Correct 1 ms 468 KB Output is correct
18 Correct 1 ms 468 KB Output is correct
19 Correct 1 ms 596 KB Output is correct
20 Correct 1 ms 468 KB Output is correct
21 Correct 1 ms 468 KB Output is correct
22 Correct 0 ms 416 KB Output is correct
23 Correct 0 ms 340 KB Output is correct
24 Correct 1 ms 468 KB Output is correct
25 Correct 2 ms 468 KB Output is correct
26 Correct 1 ms 468 KB Output is correct
27 Correct 1 ms 468 KB Output is correct
28 Correct 1 ms 468 KB Output is correct
29 Correct 1 ms 468 KB Output is correct
30 Correct 1 ms 468 KB Output is correct
31 Correct 31 ms 1808 KB Output is correct
32 Correct 41 ms 1624 KB Output is correct
33 Correct 31 ms 1816 KB Output is correct
34 Correct 29 ms 2088 KB Output is correct
35 Correct 25 ms 1976 KB Output is correct
36 Correct 26 ms 2056 KB Output is correct
37 Correct 30 ms 1532 KB Output is correct
38 Correct 1 ms 340 KB Output is correct
39 Correct 0 ms 340 KB Output is correct
40 Correct 1 ms 512 KB Output is correct
41 Correct 1 ms 468 KB Output is correct
42 Correct 1 ms 468 KB Output is correct
43 Correct 1 ms 496 KB Output is correct
44 Correct 2 ms 596 KB Output is correct
45 Correct 1 ms 468 KB Output is correct
46 Correct 1 ms 468 KB Output is correct
47 Correct 100 ms 13476 KB Output is correct
48 Correct 92 ms 12228 KB Output is correct
49 Correct 107 ms 12284 KB Output is correct
50 Correct 99 ms 14300 KB Output is correct
51 Correct 132 ms 14544 KB Output is correct
52 Correct 120 ms 14928 KB Output is correct
53 Correct 27 ms 10044 KB Output is correct
54 Correct 119 ms 12896 KB Output is correct
55 Correct 134 ms 12724 KB Output is correct
56 Correct 171 ms 12944 KB Output is correct
57 Correct 153 ms 15268 KB Output is correct
58 Correct 146 ms 13140 KB Output is correct
59 Correct 154 ms 14988 KB Output is correct
60 Correct 158 ms 14964 KB Output is correct
61 Correct 166 ms 15204 KB Output is correct
62 Correct 117 ms 14320 KB Output is correct
63 Correct 152 ms 14992 KB Output is correct
64 Correct 159 ms 14836 KB Output is correct
65 Correct 149 ms 14608 KB Output is correct
66 Correct 0 ms 340 KB Output is correct
67 Correct 118 ms 12900 KB Output is correct
68 Correct 129 ms 13292 KB Output is correct
69 Correct 164 ms 12796 KB Output is correct
70 Correct 168 ms 13220 KB Output is correct
71 Correct 139 ms 13000 KB Output is correct
72 Correct 143 ms 13504 KB Output is correct
73 Correct 155 ms 15356 KB Output is correct
74 Correct 160 ms 15644 KB Output is correct
75 Correct 160 ms 13448 KB Output is correct
76 Correct 142 ms 15268 KB Output is correct
77 Correct 81 ms 13188 KB Output is correct
78 Correct 0 ms 340 KB Output is correct
79 Correct 1 ms 468 KB Output is correct
80 Correct 1 ms 468 KB Output is correct
81 Correct 2 ms 468 KB Output is correct
82 Correct 1 ms 468 KB Output is correct
83 Correct 1 ms 468 KB Output is correct
84 Correct 1 ms 596 KB Output is correct
85 Correct 1 ms 468 KB Output is correct
86 Correct 32 ms 1612 KB Output is correct
87 Correct 35 ms 1580 KB Output is correct
88 Correct 31 ms 1836 KB Output is correct
89 Correct 30 ms 2088 KB Output is correct
90 Correct 26 ms 1868 KB Output is correct
91 Correct 24 ms 1888 KB Output is correct
92 Correct 41 ms 1480 KB Output is correct
93 Correct 90 ms 12100 KB Output is correct
94 Correct 92 ms 12008 KB Output is correct
95 Correct 110 ms 12036 KB Output is correct
96 Correct 95 ms 14148 KB Output is correct
97 Correct 118 ms 14484 KB Output is correct
98 Correct 118 ms 14188 KB Output is correct
99 Correct 28 ms 10216 KB Output is correct
100 Correct 156 ms 15060 KB Output is correct
101 Correct 165 ms 15464 KB Output is correct
102 Correct 143 ms 16480 KB Output is correct
103 Correct 148 ms 16388 KB Output is correct
104 Correct 154 ms 15548 KB Output is correct
105 Correct 146 ms 16516 KB Output is correct
106 Correct 130 ms 14708 KB Output is correct
107 Correct 144 ms 15056 KB Output is correct
108 Correct 153 ms 14664 KB Output is correct
109 Correct 158 ms 14160 KB Output is correct
110 Correct 153 ms 15420 KB Output is correct
111 Correct 157 ms 15136 KB Output is correct