oj.uz

답안 #785658

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
785658 2023-07-17T11:31:47 Z TimDee 말 (IOI15_horses) C++17
100 / 100
 440 ms 40620 KB 
#include "horses.h"
#include <bits/stdc++.h>
using namespace std;
#define forn(i,n) for(int i=0;i<n;++i)
#define pb push_back
#define all(x) x.begin(), x.end()
#define pi pair<int,int>
#define f first
#define s second
const int mod = 1e9+7;

#define int long long
int pw(int a, int b) {
  int r=1;
  while (b) {
    if (b&1) r=(r*a)%mod;
    a=(a*a)%mod;
    b>>=1;
  }
  return r;
}
int inv(int x) {
  return pw(x,mod-2);
}

struct BIT {
  vector<int> t; int n;
  BIT(int n) {
    this->n=n;
    t.assign(n,1);
  }
  void add(int i, int x) {
    for(;i<n;i=i|(i+1)) t[i]=(t[i]*x)%mod;
  }
  int sum(int r) {
    int q=1;
    for(;r>=0;r=(r&(r+1))-1) q=(q*t[r])%mod;
    return q;
  }
};
#undef int

int a[(int)5e5+5];
int c[(int)5e5+5];
BIT ft(5e5+5);
set<int> s;
int n;

struct sgt {
  vector<int> t; int sz=1;
  sgt(int n) {
    while (sz<n) sz<<=1;
    t.assign(2*sz,0);
  }
  int query(int v, int l, int r, int lx, int rx) {
    if (rx<=l || r<=lx) return 0;
    if (lx<=l && r<=rx) return t[v];
    int m=(l+r)>>1;
    int lq=query(2*v+1,l,m,lx,rx);
    int rq=query(2*v+2,m,r,lx,rx);
    return max(lq,rq);
  }
  int query(int l, int r) {
    return query(0,0,sz,l,r);
  }

  void upd(int v, int l, int r, int i) {
    if (r-l==1) return;
    int m=(l+r)>>1;
    if (i<m) upd(2*v+1,l,m,i);
    else upd(2*v+2,m,r,i);
    t[v]=max(t[2*v+1],t[2*v+2]);
  }
  void set(int i, int x) {
    t[sz-1+i]=x;
    upd(0,0,sz,i);
  }
};
sgt st(5e5+5);

int query() {
  #define int long long
  int z=1;
  int b=0;
  pi mx={0,1};
  int last=n;
  s.insert(0);
  for (auto v:s) {
    int i=-v;
    if (z>1e9) break;
    int y=st.query(i,n);
    if (y*mx.s>mx.f*z) {
      b=i;
      mx={y,z};
    }
    z*=a[i];
    last=i;
  }
  int p=ft.sum(b);
  int y=st.query(b,n);
  return (p*y)%mod;
  #undef int
}

int init(int _n, int x[], int y[]) { 
  n=_n;
  forn(i,n) a[i]=x[i], c[i]=y[i];
  forn(i,n) ft.add(i,a[i]);
  forn(i,n) if (a[i]>1) s.insert(-i);
  forn(i,n) st.set(i,c[i]);
  return query();
}
int updateX(int i, int x) {
  if (a[i]>1) s.erase(s.find(-i));
  ft.add(i,inv(a[i]));
  a[i]=x;
  if (a[i]>1) s.insert(-i);
  ft.add(i,a[i]);
  return query();
}
int updateY(int i, int x) {
  c[i]=x;
  st.set(i,c[i]);
  return query();
}

Compilation message

horses.cpp: In constructor 'BIT::BIT(long long int)':
horses.cpp:28:11: warning: declaration of 'n' shadows a member of 'BIT' [-Wshadow]
   28 |   BIT(int n) {
      |           ^
horses.cpp:27:22: note: shadowed declaration is here
   27 |   vector<int> t; int n;
      |                      ^
horses.cpp: In constructor 'BIT::BIT(long long int)':
horses.cpp:28:11: warning: declaration of 'n' shadows a member of 'BIT' [-Wshadow]
   28 |   BIT(int n) {
      |           ^
horses.cpp:27:22: note: shadowed declaration is here
   27 |   vector<int> t; int n;
      |                      ^
horses.cpp: In constructor 'BIT::BIT(long long int)':
horses.cpp:28:11: warning: declaration of 'n' shadows a member of 'BIT' [-Wshadow]
   28 |   BIT(int n) {
      |           ^
horses.cpp:27:22: note: shadowed declaration is here
   27 |   vector<int> t; int n;
      |                      ^
horses.cpp: In constructor 'sgt::sgt(int)':
horses.cpp:51:11: warning: declaration of 'n' shadows a global declaration [-Wshadow]
   51 |   sgt(int n) {
      |       ~~~~^
horses.cpp:47:5: note: shadowed declaration is here
   47 | int n;
      |     ^
horses.cpp: In constructor 'sgt::sgt(int)':
horses.cpp:51:11: warning: declaration of 'n' shadows a global declaration [-Wshadow]
   51 |   sgt(int n) {
      |       ~~~~^
horses.cpp:47:5: note: shadowed declaration is here
   47 | int n;
      |     ^
horses.cpp: In constructor 'sgt::sgt(int)':
horses.cpp:51:11: warning: declaration of 'n' shadows a global declaration [-Wshadow]
   51 |   sgt(int n) {
      |       ~~~~^
horses.cpp:47:5: note: shadowed declaration is here
   47 | int n;
      |     ^
horses.cpp: In function 'int query()':
horses.cpp:90:9: warning: conversion from 'long long int' to 'double' may change value [-Wconversion]
   90 |     if (z>1e9) break;
      |         ^
horses.cpp:91:20: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   91 |     int y=st.query(i,n);
      |                    ^
horses.cpp:100:18: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
  100 |   int y=st.query(b,n);
      |                  ^
horses.cpp:101:15: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
  101 |   return (p*y)%mod;
      |          ~~~~~^~~~
horses.cpp:86:7: warning: variable 'last' set but not used [-Wunused-but-set-variable]
   86 |   int last=n;
      |       ^~~~

Subtask #1
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 8276 KB Output is correct
2 Correct 4 ms 8276 KB Output is correct
3 Correct 3 ms 8276 KB Output is correct
4 Correct 4 ms 8320 KB Output is correct
5 Correct 3 ms 8276 KB Output is correct
6 Correct 3 ms 8276 KB Output is correct
7 Correct 4 ms 8276 KB Output is correct
8 Correct 3 ms 8276 KB Output is correct
9 Correct 4 ms 8276 KB Output is correct
10 Correct 4 ms 8276 KB Output is correct
11 Correct 3 ms 8276 KB Output is correct
12 Correct 4 ms 8276 KB Output is correct
13 Correct 3 ms 8276 KB Output is correct
14 Correct 3 ms 8276 KB Output is correct
15 Correct 4 ms 8276 KB Output is correct
16 Correct 3 ms 8276 KB Output is correct
17 Correct 3 ms 8276 KB Output is correct
18 Correct 3 ms 8276 KB Output is correct
19 Correct 4 ms 8276 KB Output is correct
20 Correct 4 ms 8276 KB Output is correct

Subtask #2
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 8276 KB Output is correct
2 Correct 3 ms 8276 KB Output is correct
3 Correct 3 ms 8276 KB Output is correct
4 Correct 3 ms 8276 KB Output is correct
5 Correct 3 ms 8276 KB Output is correct
6 Correct 3 ms 8276 KB Output is correct
7 Correct 4 ms 8276 KB Output is correct
8 Correct 3 ms 8276 KB Output is correct
9 Correct 3 ms 8276 KB Output is correct
10 Correct 3 ms 8276 KB Output is correct
11 Correct 4 ms 8340 KB Output is correct
12 Correct 3 ms 8276 KB Output is correct
13 Correct 3 ms 8276 KB Output is correct
14 Correct 3 ms 8276 KB Output is correct
15 Correct 3 ms 8276 KB Output is correct
16 Correct 3 ms 8276 KB Output is correct
17 Correct 3 ms 8276 KB Output is correct
18 Correct 3 ms 8244 KB Output is correct
19 Correct 5 ms 8284 KB Output is correct
20 Correct 4 ms 8276 KB Output is correct
21 Correct 3 ms 8276 KB Output is correct
22 Correct 3 ms 8276 KB Output is correct
23 Correct 4 ms 8380 KB Output is correct
24 Correct 4 ms 8276 KB Output is correct
25 Correct 4 ms 8424 KB Output is correct
26 Correct 6 ms 8404 KB Output is correct
27 Correct 8 ms 8368 KB Output is correct
28 Correct 6 ms 8404 KB Output is correct
29 Correct 4 ms 8276 KB Output is correct
30 Correct 5 ms 8404 KB Output is correct
31 Correct 7 ms 8372 KB Output is correct
32 Correct 6 ms 8276 KB Output is correct

Subtask #3
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 407 ms 40560 KB Output is correct
2 Correct 298 ms 40596 KB Output is correct
3 Correct 289 ms 40548 KB Output is correct
4 Correct 333 ms 40572 KB Output is correct

Subtask #4
23.0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 8276 KB Output is correct
2 Correct 3 ms 8276 KB Output is correct
3 Correct 4 ms 8276 KB Output is correct
4 Correct 3 ms 8276 KB Output is correct
5 Correct 4 ms 8296 KB Output is correct
6 Correct 3 ms 8276 KB Output is correct
7 Correct 3 ms 8276 KB Output is correct
8 Correct 4 ms 8276 KB Output is correct
9 Correct 5 ms 8276 KB Output is correct
10 Correct 4 ms 8276 KB Output is correct
11 Correct 4 ms 8276 KB Output is correct
12 Correct 4 ms 8276 KB Output is correct
13 Correct 5 ms 8276 KB Output is correct
14 Correct 5 ms 8276 KB Output is correct
15 Correct 4 ms 8276 KB Output is correct
16 Correct 3 ms 8276 KB Output is correct
17 Correct 3 ms 8276 KB Output is correct
18 Correct 5 ms 8276 KB Output is correct
19 Correct 3 ms 8276 KB Output is correct
20 Correct 3 ms 8276 KB Output is correct
21 Correct 4 ms 8276 KB Output is correct
22 Correct 4 ms 8276 KB Output is correct
23 Correct 4 ms 8376 KB Output is correct
24 Correct 5 ms 8276 KB Output is correct
25 Correct 5 ms 8420 KB Output is correct
26 Correct 5 ms 8404 KB Output is correct
27 Correct 9 ms 8368 KB Output is correct
28 Correct 6 ms 8404 KB Output is correct
29 Correct 5 ms 8364 KB Output is correct
30 Correct 6 ms 8448 KB Output is correct
31 Correct 5 ms 8276 KB Output is correct
32 Correct 6 ms 8384 KB Output is correct
33 Correct 73 ms 16260 KB Output is correct
34 Correct 69 ms 16288 KB Output is correct
35 Correct 195 ms 39648 KB Output is correct
36 Correct 193 ms 39688 KB Output is correct
37 Correct 94 ms 16264 KB Output is correct
38 Correct 115 ms 28180 KB Output is correct
39 Correct 65 ms 16156 KB Output is correct
40 Correct 180 ms 39696 KB Output is correct
41 Correct 77 ms 16204 KB Output is correct
42 Correct 80 ms 16204 KB Output is correct
43 Correct 156 ms 39572 KB Output is correct
44 Correct 172 ms 39632 KB Output is correct

Subtask #5
23.0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 8276 KB Output is correct
2 Correct 3 ms 8276 KB Output is correct
3 Correct 3 ms 8276 KB Output is correct
4 Correct 3 ms 8276 KB Output is correct
5 Correct 3 ms 8228 KB Output is correct
6 Correct 4 ms 8276 KB Output is correct
7 Correct 3 ms 8276 KB Output is correct
8 Correct 3 ms 8276 KB Output is correct
9 Correct 5 ms 8276 KB Output is correct
10 Correct 4 ms 8276 KB Output is correct
11 Correct 4 ms 8276 KB Output is correct
12 Correct 3 ms 8276 KB Output is correct
13 Correct 4 ms 8276 KB Output is correct
14 Correct 3 ms 8276 KB Output is correct
15 Correct 4 ms 8276 KB Output is correct
16 Correct 4 ms 8276 KB Output is correct
17 Correct 4 ms 8276 KB Output is correct
18 Correct 5 ms 8300 KB Output is correct
19 Correct 3 ms 8276 KB Output is correct
20 Correct 3 ms 8276 KB Output is correct
21 Correct 3 ms 8320 KB Output is correct
22 Correct 4 ms 8312 KB Output is correct
23 Correct 4 ms 8276 KB Output is correct
24 Correct 4 ms 8276 KB Output is correct
25 Correct 5 ms 8404 KB Output is correct
26 Correct 5 ms 8404 KB Output is correct
27 Correct 7 ms 8276 KB Output is correct
28 Correct 5 ms 8404 KB Output is correct
29 Correct 4 ms 8276 KB Output is correct
30 Correct 4 ms 8404 KB Output is correct
31 Correct 5 ms 8276 KB Output is correct
32 Correct 6 ms 8376 KB Output is correct
33 Correct 369 ms 40572 KB Output is correct
34 Correct 306 ms 40604 KB Output is correct
35 Correct 306 ms 40548 KB Output is correct
36 Correct 350 ms 40544 KB Output is correct
37 Correct 77 ms 16288 KB Output is correct
38 Correct 80 ms 16332 KB Output is correct
39 Correct 180 ms 39732 KB Output is correct
40 Correct 195 ms 39612 KB Output is correct
41 Correct 95 ms 16272 KB Output is correct
42 Correct 112 ms 28192 KB Output is correct
43 Correct 62 ms 16160 KB Output is correct
44 Correct 172 ms 39692 KB Output is correct
45 Correct 79 ms 16276 KB Output is correct
46 Correct 82 ms 16156 KB Output is correct
47 Correct 159 ms 39628 KB Output is correct
48 Correct 154 ms 39524 KB Output is correct
49 Correct 163 ms 18220 KB Output is correct
50 Correct 154 ms 18196 KB Output is correct
51 Correct 259 ms 40544 KB Output is correct
52 Correct 228 ms 40620 KB Output is correct
53 Correct 440 ms 18168 KB Output is correct
54 Correct 242 ms 31032 KB Output is correct
55 Correct 148 ms 16348 KB Output is correct
56 Correct 245 ms 40520 KB Output is correct
57 Correct 226 ms 17040 KB Output is correct
58 Correct 294 ms 17120 KB Output is correct
59 Correct 154 ms 39560 KB Output is correct