結果
| 問題 | No.2089 置換の符号 |
| ユーザー |
 cureskol
|
| 提出日時 | 2022-10-01 12:13:02 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 7 ms / 2,000 ms |
| コード長 | 5,559 bytes |
| コンパイル時間 | 2,661 ms |
| コンパイル使用メモリ | 224,312 KB |
| 最終ジャッジ日時 | 2025-02-07 20:12:57 |
|
ジャッジサーバーID （参考情報） |
judge3 / judge1 |
（要ログイン）
| ファイルパターン | 結果 |
|---|---|
| other | AC * 33 |
ソースコード
#pragma region template#pragma GCC optimize("Ofast")#include <bits/stdc++.h>using namespace std;#ifdef __LOCAL#include <debug>#else#define debug(...) void(0)#endifusing ll=long long;using ld=long double;using vi=vector<int>;using vll=vector<ll>;using pi=pair<int,int>;using pll=pair<ll,ll>;#define overload2(a,b,c,...) c#define overload3(a,b,c,d,...) d#define overload4(a,b,c,d,e,...) e#define overload5(a,b,c,d,e,f,...) f#define TYPE1(T) template<typename T>#define TYPE2(T,U) template<typename T,typename U>#define TYPE(...) overload2(__VA_ARGS__,TYPE2,TYPE1)(__VA_ARGS__)#define TYPES1(T) template<typename... T>#define TYPES2(H,T) template<typename H,typename... T>#define TYPES(...) overload2(__VA_ARGS__,TYPES2,TYPES1)(__VA_ARGS__)#define REP4(i,s,n,d) for(int i=(s);i<(n);i+=(d))#define REP3(i,s,n) REP4(i,s,n,1)#define REP2(i,n) REP3(i,0,n)#define REP1(n) REP2(tomato,n)#define REP(...) overload4(__VA_ARGS__,REP4,REP3,REP2,REP1)(__VA_ARGS__)#define RREP4(i,n,s,d) for(int i=(n)-1;i>=s;i-=d)#define RREP3(i,n,s) RREP4(i,n,s,1)#define RREP2(i,n) RREP3(i,n,0)#define RREP1(n) RREP2(tomato,n)#define RREP(...) overload4(__VA_ARGS__,RREP4,RREP3,RREP2,RREP1)(__VA_ARGS__)#define FOR4(a,b,c,d,v) for(auto [a,b,c,d]:v)#define FOR3(a,b,c,v) for(auto [a,b,c]:v)#define FOR2(a,b,v) for(auto [a,b]:v)#define FOR1(a,v) for(auto a:v)#define FOR(...) overload5(__VA_ARGS__,FOR4,FOR3,FOR2,FOR1)(__VA_ARGS__)#define AFOR4(a,b,c,d,v) for(auto&[a,b,c,d]:v)#define AFOR3(a,b,c,v) for(auto&[a,b,c]:v)#define AFOR2(a,b,v) for(auto&[a,b]:v)#define AFOR1(a,v) for(auto&a:v)#define AFOR(...) overload5(__VA_ARGS__,AFOR4,AFOR3,AFOR2,AFOR1)(__VA_ARGS__)#define CFOR4(a,b,c,d,v) for(const auto&[a,b,c,d]:v)#define CFOR3(a,b,c,v) for(const auto&[a,b,c]:v)#define CFOR2(a,b,v) for(const auto&[a,b]:v)#define CFOR1(a,v) for(const auto&a:v)#define CFOR(...) overload5(__VA_ARGS__,CFOR4,CFOR3,CFOR2,CFOR1)(__VA_ARGS__)#define ALL(v) v.begin(),v.end()#define RALL(v) v.rbegin(),v.rend()#define SORT(v) sort(ALL(v))#define RSORT(v) sort(RALL(v))#define REVERSE(v) reverse(ALL(v))#define UNIQUE(v) SORT(v),v.erase(unique(ALL(v)),v.end())TYPES(T) void input(T&... a){ (cin>>...>>a); }#define DECLARE(T,...) T __VA_ARGS__;input(__VA_ARGS__);#define INT(...) DECLARE(int,__VA_ARGS__)#define STR(...) DECLARE(string,__VA_ARGS__)#define LL(...) DECLARE(long long,__VA_ARGS__)#define CHR(...) DECLARE(char,__VA_ARGS__)#define DBL(...) DECLARE(double,__VA_ARGS__)#define VI(n,v) vi v(n);cin>>v;#define VLL(n,v) vll v(n);cin>>v;TYPE(T) istream&operator>>(istream&is,vector<T>&v){for(auto&a:v)cin>>a;return is;}TYPE(T) ostream&operator<<(ostream&os,const vector<T>&v){if(&os==&cerr)os<<"[";REP(i,v.size()){os<<v[i];if(i+1<v.size())os<<(&os==&cerr?",":" ");}if(&os==&cerr)os<<"]";return os;}TYPE(T,S) istream&operator>>(istream&is,pair<T,S>&p){cin>>p.first>>p.second;return is;}void print(){ cout << '\n'; }TYPES(T,Ts) void print(const T& a,const Ts&... b){cout<<a;(cout<<...<<(cout<< ' ',b));cout << '\n';}TYPE(T) using pq=priority_queue<T>;TYPE(T) using pqg=priority_queue<T,vector<T>,greater<T>>;TYPE(T) T pick(queue<T>& que){assert(que.size()); T a=que.front();que.pop();return a;}TYPE(T) T pick(pq<T>& que){assert(que.size()); T a=que.top();que.pop();return a;}TYPE(T) T pick(pqg<T>& que){assert(que.size()); T a=que.top();que.pop();return a;}TYPE(T) T pick(stack<T>& sta){assert(sta.size()); T a=sta.top();sta.pop();return a;}string YES(bool f=true){return (f?"YES":"NO");}string Yes(bool f=true){return (f?"Yes":"No");}string yes(bool f=true){return (f?"yes":"no");}constexpr int INF=1e9+7;constexpr ll LINF=ll(1e18)+7;constexpr ld EPS=1e-10;vi iota(int n){vi a(n);iota(ALL(a),0);return a;}TYPE(T) T rev(T a){ REVERSE(a);return a; }TYPE(T) void fin(T a){cout<<a<<endl;exit(0);}TYPE(T) bool chmax(T &a,T b){return (a<b&&(a=b,true));}TYPE(T) bool chmin(T &a,T b){return (a>b&&(a=b,true));}TYPES(T,Ns) auto make_vector(T x,int n,Ns ...ns){if constexpr(sizeof...(ns)==0)return vector<T>(n,x);else return vector(n,make_vector<T>(x,ns...));}bool in(const ll S,const int a){return (S>>a)&1;}int popcount(const ll S){return __builtin_popcountll(S);}#pragma endregion template#include <atcoder/fenwicktree>using namespace atcoder;template<typename T>struct Compress{map<T,int> mp;vector<T> rev;Compress()=default;Compress(const vector<T>&v,bool banpei=false){for(const T&a:v)mp[a];if(banpei)mp[numeric_limits<T>::max()],mp[numeric_limits<T>::min()];build();}void add(T a){ mp[a]; }void build(){int cnt=0;rev.resize(mp.size());for(auto&[val,id]:mp){rev[cnt]=val;id=cnt++;}}int operator[](T a)const{return mp.at(a);}int geq(T a)const{return mp.lower_bound(a)->second;}int leq(T a)const{return (--mp.upper_bound(a))->second;}int gt(T a)const{return mp.upper_bound(a)->second;}int lt(T a)const{return (--mp.lower_bound(a))->second;}T r(int id)const{return rev[id];}int size()const{return mp.size();}};template <typename T>long long inversion_number(const vector<T> &v){Compress cmp(v);fenwick_tree<int> ft(cmp.size());long long res=0;for(int i=int(v.size())-1;i>=0;i--){int j=cmp[v[i]];res+=ft.sum(0,j);ft.add(j,1);}return res;}int main(){ios::sync_with_stdio(false);cin.tie(nullptr);INT(n);VI(n,v);auto A=inversion_number(v);if(A&1)fin(-1);else fin(1);}