oj.uz

답안 #504087

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
504087 2022-01-09T17:57:49 Z Deepesson Zoltan (COCI16_zoltan) C++17
91 / 140
 357 ms 34496 KB 
#include <bits/stdc++.h>
#define MAX 205000
const long long MOD = 1e9+7;
typedef std::pair<long long,long long> pii;

typedef std::pair<int,int*> pipo;

pii comb(pii a,pii b){
    if(a.first==b.first){
        assert(a.second+b.second<MOD*MOD);
        return {a.first,a.second+b.second%(MOD-1)};
    }else return std::max(a,b);
}

pii tab[MAX*4][2]={};

pii query(int l,int r,int x,int la=0,int ra=MAX-1,int pos=1){
    if(la>r||ra<l)return tab[0][x];
    if(la>=l&&ra<=r){
        return tab[pos][x];
    }
    int m = (la+ra)/2;
    return comb(query(l,r,x,la,m,pos*2),query(l,r,x,m+1,ra,(pos*2)+1));
}

void update(int t,pii k,int x,int la=0,int ra=MAX-1,int pos=1){
    if(la>t||ra<t)return;
    if(la==ra){
        tab[pos][x]=comb(tab[pos][x],k);
        return;
    }
    int m = (la+ra)/2;
    update(t,k,x,la,m,pos*2);
    update(t,k,x,m+1,ra,(pos*2)+1);
    tab[pos][x]=comb(tab[pos*2][x],tab[(pos*2)+1][x]);
}
/**
    Tamanho e numero da sequencia crescente maior ou igual a x
    Significa que o menor numero da sequencia deve ser maior ou igual a x
    Solucao: Comecar do final e computar uma sequencia estritamente decrescente, o ultimo valor sera o menor.

    Tamanho e numero da sequencia decrescente menor que x
    Solucao: Do fim ao inicio computar uma sequencia estritamente crescente, no final eh soh consultar o maior numero.

    Depois de computar:
    Checar para todo x valido a resposta, imprimir o maior :)
    Problema: Contar numero de sequencias ;-;
**/
long long binpow(long long a,long long b,long long c){
    long long r=1;
    while(b){
        if(b&1)r=(r*a)%c;
        b/=2;
        a=(a*a)%c;
    }
    return r;
}
int main()
{
    pii base = {0,1};
    int N;
    std::cin>>N;
    int array[N]={};
    for(auto&x:array)std::cin>>x;
    int curbesto=0;
    {
        std::vector<pipo> vec;
        for(auto&x:array)vec.push_back({x,&x});
        std::sort(vec.begin(),vec.end());
        int cur=3;
        int last=-1;
        for(auto&x:vec){
            if(x.first!=last){
                last=x.first;
                ++cur;
            }
            *(x.second)=cur;
        }
        curbesto=cur;
    }
    for(int i=N-1;i!=-1;--i){
        int x = array[i];
        auto resposta=query(x+1,MAX-1,0);
        resposta=comb(resposta,base);
        update(x,{resposta.first+1,resposta.second},0);
    }
    for(int i=N-1;i!=-1;--i){
        int x = array[i];
        auto resposta=query(0,x-1,1);
        resposta=comb(resposta,base);
        update(x,{resposta.first+1,resposta.second},1);
    }
    pii best={0,0};
    for(int i=3;i!=curbesto+1;++i){
        auto a = query(i,MAX-1,0);
        a=comb(a,base);
        auto b = query(i-1,i-1,1);
        b=comb(b,base);
        pii c = {a.first+b.first,a.second*b.second};
        best=comb(best,c);
    }
  //  std::cout<<best.second<<"\n";
  //  std::cout<<binpow(2,N-best.first,MOD)<<"\n";
    std::cout<<best.first<<" "<<((((best.second/2))*binpow(2,N-best.first,MOD))%MOD)<<"\n";
}

Subtask #1
91.0 / 140.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 0 ms 332 KB Output is correct
5 Correct 0 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 2 ms 460 KB Output is correct
8 Correct 2 ms 460 KB Output is correct
9 Incorrect 2 ms 460 KB Output isn't correct
10 Correct 2 ms 332 KB Output is correct
11 Incorrect 251 ms 13676 KB Output isn't correct
12 Incorrect 210 ms 11936 KB Output isn't correct
13 Incorrect 213 ms 11280 KB Output isn't correct
14 Runtime error 225 ms 24232 KB Execution killed with signal 6
15 Runtime error 294 ms 29852 KB Execution killed with signal 6
16 Runtime error 357 ms 34496 KB Execution killed with signal 6
17 Correct 294 ms 14624 KB Output is correct
18 Correct 300 ms 14640 KB Output is correct
19 Correct 328 ms 14624 KB Output is correct
20 Correct 291 ms 14544 KB Output is correct