oj.uz

Submission #346697

# Submission time Handle Problem Language Result Execution time Memory
346697 2021-01-10T18:12:30 Z ant101 Ancient Books (IOI17_books) C++14
50 / 100
 2000 ms 69864 KB 
#include "books.h"
#include <iostream>
#include <algorithm>
#include <cstring>
#include <iomanip>
#include <fstream>
#include <cmath>
#include <vector>
#include <set>
#include <unordered_set>
#include <unordered_map>
#include <map>
#include <stack>
#include <queue>
#include <assert.h>
#include <limits>
#include <cstdio>
#include <complex>
using namespace std;

typedef long long ll;
typedef long double ld;
typedef double db;
typedef string str;

typedef pair<int, int> pi;
typedef pair<ll,ll> pl;
typedef pair<ld,ld> pd;
#define mp make_pair
#define f first
#define s second

typedef vector<int> vi;
typedef vector<ll> vl;
typedef vector<ld> vd;
typedef vector<str> vs;
typedef vector<pi> vpi;
typedef vector<pl> vpl;
typedef vector<pd> vpd;

#define sz(x) (int)x.size()
#define all(x) begin(x), end(x)
#define rall(x) (x).rbegin(), (x).rend()
#define rsz resize
#define ins insert
#define ft front()
#define bk back()
#define pf push_front
#define pb push_back
#define eb emplace_back
#define lb lower_bound
#define ub upper_bound

#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define F0R(i,a) FOR(i,0,a)
#define ROF(i,a,b) for (int i = (b)-1; i >= (a); --i)
#define R0F(i,a) ROF(i,0,a)
#define trav(a,x) for (auto& a: x)

const int MOD = 1e9+7; // 998244353; // = (119<<23)+1
const int MX = 1e6+5;
const ll INF = 1e18;
const ld PI = 4*atan((ld)1);
const int dx[4] = {0,1,0,-1}, dy[4] = {1,0,-1,0};


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
        // cin.exceptions(cin.failbit); // ex. throws exception when you try to read letter into int
        if (sz(s)) {
            setIn(s+".in");
            setOut(s+".out");
        } // for USACO
    }
}

using namespace io;

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 Arg, class... Args> void re(Arg& first, Args&... rest) {
        re(first); re(rest...);
    }
    
    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) { F0R(i,sz(a)) re(a[i]); }
    template<class T, size_t SZ> void re(array<T,SZ>& a) { F0R(i,SZ) re(a[i]); }
}

namespace output {
    template<class T1, class T2> void pr(const pair<T1,T2>& x);
    template<class T, size_t SZ> void pr(const array<T,SZ>& x);
    template<class T> void pr(const vector<T>& x);
    template<class T> void pr(const set<T>& x);
    template<class T1, class T2> void pr(const map<T1,T2>& x);
    
    template<class T> void pr(const T& x) { cout << x; }
    template<class Arg, class... Args> void pr(const Arg& first, const Args&... rest) {
        pr(first); pr(rest...);
    }
    
    template<class T1, class T2> void pr(const pair<T1,T2>& x) {
        pr("{",x.f,", ",x.s,"}");
    }
    template<class T> void prContain(const T& x) {
        pr("{");
        bool fst = 1; for (const auto& a: x) pr(!fst?", ":"",a), fst = 0; // const needed for vector<bool>
        pr("}");
    }
    template<class T, size_t SZ> void pr(const array<T,SZ>& x) { prContain(x); }
    template<class T> void pr(const vector<T>& x) { prContain(x); }
    template<class T> void pr(const set<T>& x) { prContain(x); }
    template<class T1, class T2> void pr(const map<T1,T2>& x) { prContain(x); }
    
    void ps() { pr("\n"); }
    template<class Arg> void ps(const Arg& first) {
        pr(first); ps(); // no space at end of line
    }
    template<class Arg, class... Args> void ps(const Arg& first, const Args&... rest) {
        pr(first," "); ps(rest...); // print w/ spaces
    }
}

using namespace output;

using namespace input;

ll add(ll a, ll b) {
    a += b;
    if(a >= MOD) {
        a -= MOD;
    }
    return a;
}
ll sub(ll a, ll b) {
    a -= b;
    if(a < 0) {
        a += MOD;
    }
    return a;
}

ll mul(ll a, ll b) {
    return (a * b)%MOD;
}

void add_self(ll& a, ll b) {
    a = add(a, b);
}
void sub_self(ll& a, ll b) {
    a = sub(a, b);
}
void mul_self(ll& a, ll b) {
    a = mul(a, b);
}


struct DSU {
    ll f[MX], cnt[MX], l[MX], r[MX];
    DSU() {
        for (ll i = 0; i<MX; i++) {
            f[i] = l[i] = r[i] = i;
            cnt[i] = 1;
        }
    }
    ll Find(ll x) {
        if (f[x] == x) {
            return x;
        }
        f[x] = Find(f[x]);
        return f[x];
    }
    void Union(ll x, ll y) {
        x = Find(x);
        y = Find(y);
        if (x == y) {
            return;
        }
        if (cnt[x] < cnt[y]) {
            swap(x, y);
        }
        cnt[x]+=cnt[y];
        l[x] = min(l[x], l[y]);
        r[x] = max(r[x], r[y]);
        f[y] = x;
    }
    ll getl(ll x) {
        return l[Find(x)];
    }
    ll getr(ll x) {
        return r[Find(x)];
    }
};
DSU dsu;
ll segments[2][MX];

bool in_range(bool dir, ll pos, ll le, ll ri) {
    if (!dir) {
        return pos > le;
    }
    else {
        return pos < ri;
    }
}
bool overlap(ll l1, ll r1, ll l2, ll r2) {
    return (l1<l2 && r1>r2) || (l1>r2 && r1<l2);
}

ll minimum_walk(vector<int> p, int s) {
    ll n = p.size();
    ll ans = 0;
    for (ll i = 0; i<n; i++) {
        ans+=abs(p[i]-i);
        dsu.Union(i, p[i]);
    }
    vector<ll> vec;
    for (ll i = n-1; i>=0; i--) {
        while (vec.size() && dsu.getr(i) >= vec.back()) {
            if (dsu.getl(vec.back()) < i) {
                dsu.Union(i, vec.back());
            }
            vec.pop_back();
        }
        vec.push_back(i);
    }
    for (ll i = 0; i<n; i++) {
        segments[0][i] = segments[1][i] = i;
    }
    for (ll i = 0; i<n; i++) {
        if (dsu.Find(i) == i && dsu.getl(i)!=dsu.getr(i)) {
            segments[0][dsu.getl(i)] = dsu.getr(i);
            segments[1][dsu.getr(i)] = dsu.getl(i);
        }
    }
    ll le = 0, ri = n-1;
    while (le<s && dsu.getl(le) == dsu.getr(le)) {
        le++;
    }
    while (ri>s && dsu.getl(ri) == dsu.getr(ri)) {
        ri--;
    }
    while (true) {
        ll cur = -1;
        for (ll i = dsu.getl(s)-1; i>=le; i--) {
            if (overlap(i, dsu.getr(i), s, s)) {
                cur = i;
                break;
            }
        }
        ll cost1 = 1, cost2 = 1;
        ll start = cur+1;
        if (cur == -1) {
            start = le;
            cost1 = 0;
        }
        for (ll i = start; i<dsu.getl(s); i--) {
            cost1++;
            i = dsu.getr(i);
        }
        if (cur == -1) {
            start = ri;
            cost2 = 0;
        }
        else start = dsu.getr(cur)-1;
        for (ll i = start; i>dsu.getr(s); i--) {
            cost2++;
            i = dsu.getl(i);
        }
        if (cur == -1) {
            ans+=(cost1+cost2)*2;
            break;
        }
        ans+=min(cost1, cost2)*2;
        dsu.Union(cur, s);
    }
    return ans;
}

Compilation message

books.cpp: In function 'void io::setIn(std::string)':
books.cpp:68:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   68 |     void setIn(string s) { freopen(s.c_str(),"r",stdin); }
      |                            ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
books.cpp: In function 'void io::setOut(std::string)':
books.cpp:69:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   69 |     void setOut(string s) { freopen(s.c_str(),"w",stdout); }
      |                             ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 31596 KB Output is correct
2 Correct 17 ms 31596 KB Output is correct
3 Correct 17 ms 31596 KB Output is correct
4 Correct 17 ms 31596 KB Output is correct
5 Correct 18 ms 31596 KB Output is correct
6 Correct 17 ms 31596 KB Output is correct
7 Correct 17 ms 31596 KB Output is correct
8 Correct 17 ms 31596 KB Output is correct
9 Correct 17 ms 31596 KB Output is correct
10 Correct 17 ms 31596 KB Output is correct
11 Correct 17 ms 31596 KB Output is correct
12 Correct 17 ms 31596 KB Output is correct
13 Correct 17 ms 31596 KB Output is correct
14 Correct 17 ms 31612 KB Output is correct
15 Correct 17 ms 31596 KB Output is correct
16 Correct 17 ms 31596 KB Output is correct
17 Correct 17 ms 31596 KB Output is correct
18 Correct 20 ms 31596 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 31596 KB Output is correct
2 Correct 17 ms 31596 KB Output is correct
3 Correct 17 ms 31596 KB Output is correct
4 Correct 17 ms 31596 KB Output is correct
5 Correct 18 ms 31596 KB Output is correct
6 Correct 17 ms 31596 KB Output is correct
7 Correct 17 ms 31596 KB Output is correct
8 Correct 17 ms 31596 KB Output is correct
9 Correct 17 ms 31596 KB Output is correct
10 Correct 17 ms 31596 KB Output is correct
11 Correct 17 ms 31596 KB Output is correct
12 Correct 17 ms 31596 KB Output is correct
13 Correct 17 ms 31596 KB Output is correct
14 Correct 17 ms 31612 KB Output is correct
15 Correct 17 ms 31596 KB Output is correct
16 Correct 17 ms 31596 KB Output is correct
17 Correct 17 ms 31596 KB Output is correct
18 Correct 20 ms 31596 KB Output is correct
19 Correct 17 ms 31724 KB Output is correct
20 Correct 17 ms 31724 KB Output is correct
21 Correct 17 ms 31724 KB Output is correct
22 Correct 17 ms 31724 KB Output is correct
23 Correct 18 ms 31724 KB Output is correct
24 Correct 17 ms 31724 KB Output is correct
25 Correct 17 ms 31732 KB Output is correct
26 Correct 17 ms 31724 KB Output is correct
27 Correct 18 ms 31724 KB Output is correct
28 Correct 18 ms 31724 KB Output is correct
29 Correct 18 ms 31724 KB Output is correct

Subtask #3
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 31596 KB Output is correct
2 Correct 17 ms 31596 KB Output is correct
3 Correct 17 ms 31596 KB Output is correct
4 Correct 17 ms 31596 KB Output is correct
5 Correct 18 ms 31596 KB Output is correct
6 Correct 17 ms 31596 KB Output is correct
7 Correct 17 ms 31596 KB Output is correct
8 Correct 17 ms 31596 KB Output is correct
9 Correct 17 ms 31596 KB Output is correct
10 Correct 17 ms 31596 KB Output is correct
11 Correct 17 ms 31596 KB Output is correct
12 Correct 17 ms 31596 KB Output is correct
13 Correct 17 ms 31596 KB Output is correct
14 Correct 17 ms 31612 KB Output is correct
15 Correct 17 ms 31596 KB Output is correct
16 Correct 17 ms 31596 KB Output is correct
17 Correct 17 ms 31596 KB Output is correct
18 Correct 20 ms 31596 KB Output is correct
19 Correct 17 ms 31724 KB Output is correct
20 Correct 17 ms 31724 KB Output is correct
21 Correct 17 ms 31724 KB Output is correct
22 Correct 17 ms 31724 KB Output is correct
23 Correct 18 ms 31724 KB Output is correct
24 Correct 17 ms 31724 KB Output is correct
25 Correct 17 ms 31732 KB Output is correct
26 Correct 17 ms 31724 KB Output is correct
27 Correct 18 ms 31724 KB Output is correct
28 Correct 18 ms 31724 KB Output is correct
29 Correct 18 ms 31724 KB Output is correct
30 Correct 365 ms 61804 KB Output is correct
31 Correct 360 ms 61916 KB Output is correct
32 Correct 167 ms 69864 KB Output is correct
33 Correct 191 ms 67060 KB Output is correct
34 Correct 190 ms 67028 KB Output is correct
35 Correct 199 ms 65496 KB Output is correct
36 Correct 199 ms 63120 KB Output is correct
37 Correct 202 ms 61932 KB Output is correct
38 Correct 208 ms 61804 KB Output is correct
39 Correct 205 ms 61932 KB Output is correct
40 Correct 216 ms 61804 KB Output is correct
41 Correct 287 ms 61804 KB Output is correct
42 Correct 262 ms 61932 KB Output is correct
43 Correct 186 ms 61804 KB Output is correct

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2089 ms 31724 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 31596 KB Output is correct
2 Correct 17 ms 31596 KB Output is correct
3 Correct 17 ms 31596 KB Output is correct
4 Correct 17 ms 31596 KB Output is correct
5 Correct 18 ms 31596 KB Output is correct
6 Correct 17 ms 31596 KB Output is correct
7 Correct 17 ms 31596 KB Output is correct
8 Correct 17 ms 31596 KB Output is correct
9 Correct 17 ms 31596 KB Output is correct
10 Correct 17 ms 31596 KB Output is correct
11 Correct 17 ms 31596 KB Output is correct
12 Correct 17 ms 31596 KB Output is correct
13 Correct 17 ms 31596 KB Output is correct
14 Correct 17 ms 31612 KB Output is correct
15 Correct 17 ms 31596 KB Output is correct
16 Correct 17 ms 31596 KB Output is correct
17 Correct 17 ms 31596 KB Output is correct
18 Correct 20 ms 31596 KB Output is correct
19 Correct 17 ms 31724 KB Output is correct
20 Correct 17 ms 31724 KB Output is correct
21 Correct 17 ms 31724 KB Output is correct
22 Correct 17 ms 31724 KB Output is correct
23 Correct 18 ms 31724 KB Output is correct
24 Correct 17 ms 31724 KB Output is correct
25 Correct 17 ms 31732 KB Output is correct
26 Correct 17 ms 31724 KB Output is correct
27 Correct 18 ms 31724 KB Output is correct
28 Correct 18 ms 31724 KB Output is correct
29 Correct 18 ms 31724 KB Output is correct
30 Correct 365 ms 61804 KB Output is correct
31 Correct 360 ms 61916 KB Output is correct
32 Correct 167 ms 69864 KB Output is correct
33 Correct 191 ms 67060 KB Output is correct
34 Correct 190 ms 67028 KB Output is correct
35 Correct 199 ms 65496 KB Output is correct
36 Correct 199 ms 63120 KB Output is correct
37 Correct 202 ms 61932 KB Output is correct
38 Correct 208 ms 61804 KB Output is correct
39 Correct 205 ms 61932 KB Output is correct
40 Correct 216 ms 61804 KB Output is correct
41 Correct 287 ms 61804 KB Output is correct
42 Correct 262 ms 61932 KB Output is correct
43 Correct 186 ms 61804 KB Output is correct
44 Execution timed out 2089 ms 31724 KB Time limit exceeded
45 Halted 0 ms 0 KB -