// Om Namah Shivaya
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
template<typename T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
typedef long long int ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL)
#define pb push_back
#define endl '\n'
#define sz(a) a.size()
#define setbits(x) __builtin_popcountll(x)
#define ff first
#define ss second
#define conts continue
#define ceil2(x, y) ((x + y - 1) / (y))
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define yes cout << "Yes" << endl
#define no cout << "No" << endl
#define rep(i, n) for(int i = 0; i < n; ++i)
#define rep1(i, n) for(int i = 1; i <= n; ++i)
#define rev(i, s, e) for(int i = s; i >= e; --i)
#define trav(i, a) for(auto &i : a)
template<typename T>
void amin(T &a, T b) {
a = min(a, b);
}
template<typename T>
void amax(T &a, T b) {
a = max(a, b);
}
#ifdef LOCAL
#include "debug.h"
#else
#define debug(x) 42
#endif
/*
sell at exactly 1 place
*/
const int MOD = 1e9 + 7;
const int N = 5e5 + 5;
const int inf1 = int(1e9) + 5;
const ll inf2 = ll(1e18) + 5;
#include "horses.h"
template<typename T>
struct segtree1 {
// https://codeforces.com/blog/entry/18051
/*=======================================================*/
struct data {
ll a;
};
data neutral = {1};
data merge(data &left, data &right) {
data curr;
curr.a = left.a * right.a % MOD;
return curr;
}
void create(int i, T v) {
tr[i].a = v;
}
void modify(int i, T v) {
tr[i].a = v;
}
/*=======================================================*/
int n;
vector<data> tr;
segtree1() {
}
segtree1(int siz) {
init(siz);
}
void init(int siz) {
n = siz;
tr.assign(2 * n, neutral);
}
void build(vector<T> &a, int siz) {
rep(i, siz) create(i + n, a[i]);
rev(i, n - 1, 1) tr[i] = merge(tr[i << 1], tr[i << 1 | 1]);
}
void pupd(int i, T v) {
modify(i + n, v);
for (i = (i + n) >> 1; i; i >>= 1) tr[i] = merge(tr[i << 1], tr[i << 1 | 1]);
}
data query(int l, int r) {
data resl = neutral, resr = neutral;
for (l += n, r += n; l <= r; l >>= 1, r >>= 1) {
if (l & 1) resl = merge(resl, tr[l++]);
if (!(r & 1)) resr = merge(tr[r--], resr);
}
return merge(resl, resr);
}
};
template<typename T>
struct segtree2 {
// https://codeforces.com/blog/entry/18051
/*=======================================================*/
struct data {
ll a;
};
data neutral = {0};
data merge(data &left, data &right) {
data curr;
curr.a = max(left.a,right.a);
return curr;
}
void create(int i, T v) {
tr[i].a = v;
}
void modify(int i, T v) {
tr[i].a = v;
}
/*=======================================================*/
int n;
vector<data> tr;
segtree2() {
}
segtree2(int siz) {
init(siz);
}
void init(int siz) {
n = siz;
tr.assign(2 * n, neutral);
}
void build(vector<T> &a, int siz) {
rep(i, siz) create(i + n, a[i]);
rev(i, n - 1, 1) tr[i] = merge(tr[i << 1], tr[i << 1 | 1]);
}
void pupd(int i, T v) {
modify(i + n, v);
for (i = (i + n) >> 1; i; i >>= 1) tr[i] = merge(tr[i << 1], tr[i << 1 | 1]);
}
data query(int l, int r) {
data resl = neutral, resr = neutral;
for (l += n, r += n; l <= r; l >>= 1, r >>= 1) {
if (l & 1) resl = merge(resl, tr[l++]);
if (!(r & 1)) resr = merge(tr[r--], resr);
}
return merge(resl, resr);
}
};
ll n;
vector<ll> a(N), b(N);
set<ll> active;
segtree1<ll> st_prod(N);
segtree2<ll> st_max(N);
int get_ans(){
// {
// ll ans = 0;
// ll curr = 1;
// rep(i,n){
// curr *= a[i];
// amax(ans, curr * b[i]);
// }
// return ans;
// }
ll prod = 1;
vector<ll> points;
points.pb(n);
bool big = false;
for(auto it = active.rbegin(); it != active.rend(); ++it){
ll pos = *it;
prod *= a[pos];
points.pb(pos);
if(prod > inf1){
big = true;
break;
}
}
if(!big and points.back() != 0){
points.pb(0);
}
reverse(all(points));
points.resize(unique(all(points))-points.begin());
ll befprod = st_prod.query(0,points.front()-1).a;
__int128 curr = 1;
__int128 best = 0;
rep(i,sz(points)-1){
curr *= a[i];
ll l = points[i], r = points[i+1]-1;
ll mxb = st_max.query(l,r).a;
amax(best, curr * mxb);
}
ll ans = (best % MOD) * befprod % MOD;
return ans;
}
int init(int n_, int X[], int Y[]) {
n = n_;
rep(i,n) a[i] = X[i], b[i] = Y[i];
rep(i,n){
if(a[i] > 1){
active.insert(i);
}
st_prod.pupd(i,a[i]);
st_max.pupd(i,b[i]);
}
return get_ans();
}
int updateX(int pos, int val) {
if(a[pos] > 1){
active.erase(pos);
}
a[pos] = val;
st_prod.pupd(pos,val);
if(a[pos] > 1){
active.insert(pos);
}
return get_ans();
}
int updateY(int pos, int val) {
b[pos] = val;
st_max.pupd(pos,val);
return get_ans();
}
Compilation message
horses.cpp: In function 'int get_ans()':
horses.cpp:238:45: warning: conversion from '__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type' {aka 'long long int'} to 'int' may change value [-Wconversion]
238 | ll befprod = st_prod.query(0,points.front()-1).a;
| ~~~~~~~~~~~~~~^~
horses.cpp:30:36: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
30 | #define rep(i, n) for(int i = 0; i < n; ++i)
......
242 | rep(i,sz(points)-1){
| ~~~~~~~~~~~~~~
horses.cpp:242:2: note: in expansion of macro 'rep'
242 | rep(i,sz(points)-1){
| ^~~
horses.cpp:245:25: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
245 | ll mxb = st_max.query(l,r).a;
| ^
horses.cpp:245:27: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
245 | ll mxb = st_max.query(l,r).a;
| ^
horses.cpp:249:34: warning: conversion from '__int128' to 'll' {aka 'long long int'} may change value [-Wconversion]
249 | ll ans = (best % MOD) * befprod % MOD;
| ~~~~~~~~~~~~~~~~~~~~~~~^~~~~
horses.cpp:250:9: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
250 | return ans;
| ^~~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
8 ms |
23764 KB |
Output is correct |
| 2 |
Incorrect |
8 ms |
23764 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
8 ms |
23752 KB |
Output is correct |
| 2 |
Incorrect |
8 ms |
23764 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
257 ms |
52140 KB |
Output is correct |
| 2 |
Correct |
312 ms |
52100 KB |
Output is correct |
| 3 |
Incorrect |
294 ms |
52140 KB |
Output isn't correct |
| 4 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
8 ms |
23764 KB |
Output is correct |
| 2 |
Incorrect |
8 ms |
23764 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
8 ms |
23788 KB |
Output is correct |
| 2 |
Incorrect |
10 ms |
23776 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
