Submission #398000

#	Time	Username	Problem	Language	Result	Execution time	Memory
398000		ACmachine	Gondola (IOI14_gondola)	C++17	75 / 100	44 ms	7436 KiB

gondola

#include "gondola.h"
#include <bits/stdc++.h>
using namespace std;
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;

template<typename T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
template<typename T, typename U> using ordered_map = tree<T, U, less<T>, rb_tree_tag, tree_order_statistics_node_update>;

typedef long long ll;
typedef long double ld;

typedef pair<int,int> pii;
typedef pair<ll,ll> pll;

typedef vector<int> vi;
typedef vector<ll> vll;

#define FOR(i,j,k,in) for(int i=(j); i < (k);i+=in)
#define FORD(i,j,k,in) for(int i=(j); i >=(k);i-=in)
#define REP(i,b) FOR(i,0,b,1)
#define REPD(i,b) FORD(i,b,0,1)
#define pb push_back
#define mp make_pair
#define ff first
#define ss second
#define all(x) begin(x), end(x)
#define MANY_TESTS int tcase; cin >> tcase; while(tcase--)

const double EPS = 1e-9;
const int MOD = 1e9+7;
const ll INFF = 1e18;
const int INF = 1e9;
const ld PI = acos((ld)-1);
const vi dy = {1, 0, -1, 0, -1, 1, 1, -1};
const vi dx = {0, 1, 0, -1, -1, 1, -1, 1};

void DBG(){cout << "]" << endl;}
template<typename T, typename ...U> void DBG(const T& head, const U... args){ cout << head << "; "; DBG(args...); }
#define dbg(...) cout << "Line(" << __LINE__ << ") -> [" << #__VA_ARGS__ << "]: [", DBG(__VA_ARGS__);
#define chk() cout << "Check at line(" << __LINE__ << ") hit." << endl;

template<class T, unsigned int U>
ostream& operator<<(ostream& out, const array<T, U> &v){out << "[";  REP(i, U) out << v[i] << ", ";  out << "]"; return out;}
template <class T, class U>
ostream& operator<<(ostream& out, const pair<T, U> &par) {out << "[" << par.first << ";" << par.second << "]"; return out;}
template <class T>
ostream& operator<<(ostream& out, const set<T> &cont) { out << "{"; for( const auto &x:cont) out << x << ", "; out << "}"; return out; }
template <class T, class U>
ostream& operator<<(ostream& out, const map<T, U> &cont) {out << "{"; for( const auto &x:cont) out << x << ", "; out << "}"; return out; }
template<class T>
ostream& operator<<(ostream& out, const vector<T> &v){ out << "[";  REP(i, v.size()) out << v[i] << ", ";  out << "]"; return out;}

template<class T>
istream& operator>>(istream& in, vector<T> &v){ for(auto &x : v) in >> x; return in; }


const int mx = (int)1e6 + 5;
int valid(int n, int inputSeq[])
{
    vector<int> inp(n);
    REP(i, n)
        inp[i] = inputSeq[i];
    auto rotate_seq = [&](){
        int mini = min_element(all(inp)) - inp.begin();
        rotate(inp.begin(), inp.begin() + mini, inp.end());
    };
    rotate_seq();
    bool can = true;
    int last = -1;
    vector<int> cnt(mx, 0);
    REP(i, inp.size()) cnt[inp[i]]++;
    REP(i, mx){
        if(cnt[i] > 1) can = false;
    }
    REP(i, inp.size()){
        if(inp[i] <= n){
            if(last != -1 && inp[i] != inp[last] + (i - last))
                can = false;
            last = i;
        }
    }
    return (can ? 1 : 0);
}

//----------------------

int replacement(int n, int gondolaSeq[], int replacementSeq[])
{
    vector<int> inp(n);
    REP(i, n)
        inp[i] = gondolaSeq[i];
    auto rotate_seq = [&](){
        int mini = min_element(all(inp)) - inp.begin();
        if(inp[mini] > n) return;
        int rot = mini - inp[mini] + 1;
        if(rot < 0) rot += n;
        rotate(inp.begin(), inp.begin() + rot, inp.end());
        //rotate(inp.begin(), inp.begin() + mini, inp.end());
    };
    rotate_seq();
    vector<int> pos(mx, -1);
    REP(i, n){
        pos[inp[i]] = i;
    }
    set<int> incorrect;
    REP(i, n){
        if(inp[i] != i + 1)
            incorrect.insert(i);
    }
    int l = 0;
    vector<int> narr(n);
    iota(all(narr), 1);
    FOR(i, n + 1, mx, 1){
        if(incorrect.empty()) break;
        if(pos[i] == -1){
            replacementSeq[l] = narr[*incorrect.begin()];
            narr[*incorrect.begin()] = i;
            l++;
        }
        else{
            replacementSeq[l] = narr[pos[i]];
            incorrect.erase(pos[i]);
            narr[pos[i]] = i;
            l++;
        }
    }
    return l;
}

//----------------------
const int mod = (int)1e9 + 9;
struct Mint{
    ll v;
    Mint(){v = 0;}
    Mint(ll _v){
        v = _v;
        v%= mod;
        if(v < 0) v += mod;
    }
    friend Mint operator*(Mint a, Mint b){
        return Mint(a.v * b.v);
    }
};

int countReplacement(int n, int inputSeq[])
{
    vector<int> inp(n);
    REP(i, n)
        inp[i] = inputSeq[i];
    auto check_validity = [](vector<int> inp, int n){
        const int mx = (int)1e6 + 6;
        auto rotate_seq = [&](){
            int mini = min_element(all(inp)) - inp.begin();
            rotate(inp.begin(), inp.begin() + mini, inp.end());
        };
        rotate_seq();
        bool can = true;
        int last = -1;
        vector<int> cnt(mx, 0);
        REP(i, inp.size()) cnt[inp[i]]++;
        REP(i, mx){
            if(cnt[i] > 1) can = false;
        }
        REP(i, inp.size()){
            if(inp[i] <= n){
                if(last != -1 && inp[i] != inp[last] + (i - last))
                    can = false;
                last = i;
            }
        }
        return (can ? 1 : 0);
    };
    if(!check_validity(inp, n)){
        return 0;
    }
    auto rotate_seq = [&](){
        int mini = min_element(all(inp)) - inp.begin();
        if(inp[mini] > n) return;
        int rot = mini - inp[mini] + 1;
        if(rot < 0) rot += n;
        rotate(inp.begin(), inp.begin() + rot, inp.end());
    };
    rotate_seq();
    vector<int> pos(mx, -1);
    REP(i, n){
        pos[inp[i]] = i;
    }
    set<int> incorrect;
    REP(i, n){
        if(inp[i] != i + 1)
            incorrect.insert(i);
    }
    Mint ans(1);
    FOR(i, n + 1, mx, 1){
        if(incorrect.empty()) break;
        if(pos[i] == -1){
            ans = ans * Mint(incorrect.size());
        }
        else{
            incorrect.erase(pos[i]);
        }
    }
    int diff = *min_element(all(inp)) - n;
    Mint temp(1);
    if(diff - 1 > 0){
        REP(i, diff - 1){
            temp = temp * Mint(n);
        }
    }
    ans = ans * temp;
    return (int)ans.v;
}

Compilation message (stderr)

gondola.cpp: In function 'int valid(int, int*)':
gondola.cpp:20:40: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 | #define FOR(i,j,k,in) for(int i=(j); i < (k);i+=in)
      |                                        ^
gondola.cpp:22:18: note: in expansion of macro 'FOR'
   22 | #define REP(i,b) FOR(i,0,b,1)
      |                  ^~~
gondola.cpp:73:5: note: in expansion of macro 'REP'
   73 |     REP(i, inp.size()) cnt[inp[i]]++;
      |     ^~~
gondola.cpp:20:40: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 | #define FOR(i,j,k,in) for(int i=(j); i < (k);i+=in)
      |                                        ^
gondola.cpp:22:18: note: in expansion of macro 'FOR'
   22 | #define REP(i,b) FOR(i,0,b,1)
      |                  ^~~
gondola.cpp:77:5: note: in expansion of macro 'REP'
   77 |     REP(i, inp.size()){
      |     ^~~
gondola.cpp: In lambda function:
gondola.cpp:20:40: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 | #define FOR(i,j,k,in) for(int i=(j); i < (k);i+=in)
      |                                        ^
gondola.cpp:22:18: note: in expansion of macro 'FOR'
   22 | #define REP(i,b) FOR(i,0,b,1)
      |                  ^~~
gondola.cpp:162:9: note: in expansion of macro 'REP'
  162 |         REP(i, inp.size()) cnt[inp[i]]++;
      |         ^~~
gondola.cpp:20:40: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 | #define FOR(i,j,k,in) for(int i=(j); i < (k);i+=in)
      |                                        ^
gondola.cpp:22:18: note: in expansion of macro 'FOR'
   22 | #define REP(i,b) FOR(i,0,b,1)
      |                  ^~~
gondola.cpp:166:9: note: in expansion of macro 'REP'
  166 |         REP(i, inp.size()){
      |         ^~~

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 10 / 10
• Subtask 4: 5 / 5
• Subtask 5: 10 / 10
• Subtask 6: 20 / 20
• Subtask 7: 5 / 5
• Subtask 8: 15 / 15
• Subtask 9: 0 / 15
• Subtask 10: 0 / 10