#include "horses.h"
#include <bits/stdc++.h>
#pragma GCC optimize("O3")
using namespace std;
#define OPTM ios_base::sync_with_stdio(0); cin.tie(0);
#define INF int64_t(1e9+7)
#define ln '\n'
#define ll long long
#define ull unsigned long long
#define ui unsigned int
#define us unsigned short
#define FOR(i,s,n) for (int i = s; i < n; i++)
#define FORR(i,n,s) for (int i = n; i > s; i--)
#define FORX(u, arr) for (auto u : arr)
#define PB push_back
#define in(v,x) (v.find(x) != v.end())
#define F first
#define S second
#define PII pair<int, int>
#define PLL pair<ll, ll>
#define UM unordered_map
#define US unordered_set
#define PQ priority_queue
#define ALL(v) v.begin(), v.end()
const ll LLINF = 1e18+1;
const int MAXN = 5e5+1, LOG = 30;
const ll MAXX = 1e9;
int n;
ll x[MAXN], y[MAXN];
set<int> a;
ll st[MAXN*4], st1[MAXN*4];
void build(int s, int tl, int tr) {
if (tl == tr) st[s] = y[tl];
else {
int tm = (tl+tr)/2;
build(s*2,tl,tm);
build(s*2+1,tm+1,tr);
st[s] = max(st[s*2], st[s*2+1]);
}
}
void update(int s, int tl, int tr, int idx, ll val) {
if (tl == tr) st[s] = val;
else {
int tm = (tl+tr)/2;
if (idx <= tm) update(s*2,tl,tm,idx,val);
else update(s*2+1,tm+1,tr,idx,val);
st[s] = max(st[s*2], st[s*2+1]);
}
}
ll query(int s, int tl, int tr, int l, int r) {
if (tl == tr) return st[s];
else {
int tm = (tl+tr)/2;
ll cur = -INF;
if (l <= tm) cur = max(cur, query(s*2,tl,tm,l,r));
if (r > tm) cur = max(cur, query(s*2+1,tm+1,tr,l,r));
return cur;
}
}
void build1(int s, int tl, int tr) {
if (tl == tr) st1[s] = x[tl];
else {
int tm = (tl+tr)/2;
build1(s*2,tl,tm);
build1(s*2+1,tm+1,tr);
st1[s] = (st1[s*2]*st1[s*2+1])%INF;
}
}
void update1(int s, int tl, int tr, int idx, ll val) {
if (tl == tr) st1[s] = val;
else {
int tm = (tl+tr)/2;
if (idx <= tm) update1(s*2,tl,tm,idx,val);
else update1(s*2+1,tm+1,tr,idx,val);
st1[s] = (st1[s*2]*st1[s*2+1])%INF;
}
}
ll query1(int s, int tl, int tr, int l, int r) {
if (tl == tr) return st1[s];
else {
int tm = (tl+tr)/2;
ll cur = 1ll;
if (l <= tm) cur = (cur*query1(s*2,tl,tm,l,r))%INF;
if (r > tm) cur = (cur*query1(s*2+1,tm+1,tr,l,r))%INF;
return cur;
}
}
int num = 0;
int calc() {
vector<int> v;
int cnt = 0;
// for (auto it = a.rbegin(); it != a.rend(); it++) {
// v.PB(*it);
// cnt++;
// if (cnt >= LOG) break;
// }
v.PB(0);
reverse(ALL(v));
// FORX(u,v) cout << u << ' ';
// cout << ln;
int vn = v.size();
ll xval = 1, yval = 0, cur = -INF, idx = -1;
FOR(i,0,vn) {
int en = i == vn-1 ? n-1 : v[i+1]-1;
xval *= x[v[i]];
yval = query(1,0,n-1,v[i],en);
if (xval*yval > cur) {
idx = i;
cur = yval;
xval = 1;
}
}
int en = idx == vn-1 ? n-1 : v[idx+1]-1;
// cout << v[idx] << ln;
ll res = (query1(1,0,n-1,0,v[idx])*query(1,0,n-1,v[idx],en))%INF;
return res;
}
int init(int N, int X[], int Y[]) {
OPTM;
n = N;
FOR(i,0,n) {
x[i] = X[i];
y[i] = Y[i];
}
a.insert(0);
build(1,0,n-1);
build1(1,0,n-1);
//FOR(i,0,n) if (x[i] > 1) a.insert(i);
return calc();
}
int updateX(int pos, int val) {
update1(1,0,n-1,pos,val);
x[pos] = val;
if (val == 1 && a.count(pos) && pos != 0) a.erase(pos);
if (val > 1) a.insert(pos);
return calc();
}
int updateY(int pos, int val) {
update(1,0,n-1,pos,val);
y[pos] = val;
return calc();
}
Compilation message
horses.cpp: In function 'int calc()':
horses.cpp:110:17: warning: conversion from 'std::vector<int>::size_type' {aka 'long unsigned int'} to 'int' may change value [-Wconversion]
110 | int vn = v.size();
| ~~~~~~^~
horses.cpp:125:9: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
125 | return res;
| ^~~
horses.cpp:100:6: warning: unused variable 'cnt' [-Wunused-variable]
100 | int cnt = 0;
| ^~~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
340 KB |
Output is correct |
| 2 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
340 KB |
Output is correct |
| 2 |
Incorrect |
0 ms |
340 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Execution timed out |
1569 ms |
28492 KB |
Time limit exceeded |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
340 KB |
Output is correct |
| 2 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
340 KB |
Output is correct |
| 2 |
Incorrect |
0 ms |
340 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
