oj.uz

답안 #23074

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
23074 2017-05-02T15:30:34 Z model_code Zoltan (COCI16_zoltan) C++11
140 / 140
 159 ms 23176 KB 
#include <iostream>
#include <cstdio>
#include <vector>
#include <algorithm>
using namespace std;

#define TRACE(x) cout << #x << " = " << x << endl;

typedef long long int llint;

typedef pair<int, int> par;

#define X first
#define Y second

const int MAXN = 500010, MOD = 1000000007;

inline int add(int a, int b)
{
  int ret = a + b;
  if(ret >= MOD) ret -= MOD;
  return ret;
}

inline int mul(int a, int b)
{
  llint ret = (llint)a * b;
  if(ret >= MOD) ret %= MOD;
  return ret;
}

int n;
int niz[MAXN], dva[MAXN];

par A[MAXN], B[MAXN];
par FWT_gore[MAXN], FWT_dolje[MAXN];

par rj;

par spoji(par a, par b)
{
 if(b.X > a.X)
 {
   a.X = b.X;
   a.Y = b.Y;
 } 
 else if(b.X == a.X)
   a.Y = add(a.Y, b.Y);
 return a;
}

void ubaci_gore(int x, par v)
{
  x += 5;
  for(; x < MAXN; x += x & -x)
    FWT_gore[x] = spoji(FWT_gore[x], v);
}

par upit_gore(int x)
{
  x += 5;
  par ret(0, 0);
  for(; x > 0; x -= x & -x)
    ret = spoji(ret, FWT_gore[x]);
  return ret;
}

void ubaci_dolje(int x, par v)
{
  x += 5;
  for(; x > 0; x -= x & -x)
    FWT_dolje[x] = spoji(FWT_dolje[x], v);
}

par upit_dolje(int x)
{
  x += 5;
  par ret(0, 0);
  for(; x < MAXN; x += x & -x)
    ret = spoji(ret, FWT_dolje[x]);
  return ret;
}

void sazmi()
{
  vector<int> v;
  for(int i = 0; i < n; i++)
    v.push_back(niz[i]);
  sort(v.begin(), v.end());
  v.resize(unique(v.begin(), v.end()) - v.begin());
  for(int i = 0; i < n; i++)
    niz[i] = lower_bound(v.begin(), v.end(), niz[i]) - v.begin();
}

void sredi_gore()
{
  for(int i = n - 1; i >= 0; i--)
  {
    par p = upit_gore(niz[i] - 1);
    if(p.X == 0)
    {
      A[i] = par(0, 1);
      ubaci_gore(niz[i], par(1, 1));
    }
    else 
    {
      A[i] = p;
      p.X++;
      ubaci_gore(niz[i], p);
    }
  }
}

void sredi_dolje()
{
  for(int i = n - 1; i >= 0; i--)
  {
    par p = upit_dolje(niz[i] + 1);
    if(p.X == 0)
    {
      B[i] = par(0, 1);
      ubaci_dolje(niz[i], par(1, 1));
    }
    else
    {
      B[i] = p;
      p.X++;
      ubaci_dolje(niz[i], p);
    }
  }
}

void postavi()
{
  dva[0] = 1;
  for(int i = 1; i < MAXN; i++)
    dva[i] = mul(dva[i - 1], 2);
}

void glavno()
{
  for(int i = 0; i < n; i++)
    rj = spoji(rj, par(A[i].X + 1 + B[i].X, mul(A[i].Y, B[i].Y)));
  rj.Y = mul(rj.Y, dva[n - rj.X]);
}

int main()
{
  postavi();
  scanf("%d", &n);
  for(int i = 0; i < n; i++)
    scanf("%d", &niz[i]);
  sazmi();
  sredi_gore();
  sredi_dolje();
  glavno();
  printf("%d %d\n", rj.X, rj.Y);
  return 0;
}

Compilation message

zoltan.cpp: In function 'int main()':
zoltan.cpp:150:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &n);
                  ^
zoltan.cpp:152:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &niz[i]);
                         ^

Subtask #1
140.0 / 140.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 21556 KB Output is correct
2 Correct 3 ms 21556 KB Output is correct
3 Correct 0 ms 21556 KB Output is correct
4 Correct 3 ms 21556 KB Output is correct
5 Correct 3 ms 21556 KB Output is correct
6 Correct 3 ms 21556 KB Output is correct
7 Correct 3 ms 21556 KB Output is correct
8 Correct 0 ms 21556 KB Output is correct
9 Correct 3 ms 21556 KB Output is correct
10 Correct 3 ms 21556 KB Output is correct
11 Correct 89 ms 23176 KB Output is correct
12 Correct 69 ms 23176 KB Output is correct
13 Correct 69 ms 22408 KB Output is correct
14 Correct 96 ms 23176 KB Output is correct
15 Correct 133 ms 23176 KB Output is correct
16 Correct 159 ms 23176 KB Output is correct
17 Correct 109 ms 23176 KB Output is correct
18 Correct 116 ms 23176 KB Output is correct
19 Correct 103 ms 23176 KB Output is correct
20 Correct 103 ms 23176 KB Output is correct