Submission #920931

#	Time	Username	Problem	Language	Result	Execution time	Memory
920931		oblantis	Horses (IOI15_horses)	C++17	0 / 100	390 ms	46612 KiB

horses

#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
#pragma GCC optimize("O3,unroll-loops")
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define all(v) v.begin(), v.end()
#define pb push_back
#define ss second
#define ff first
#define vt vector
using namespace std;
using namespace __gnu_pbds;
typedef long long ll;
typedef pair<int, int> pii;
typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;
const int inf = 1e9;
const int mod = 1e9+7;
const int maxn = 5e5 + 1;
#include "horses.h"
int t[maxn * 4], it, nw, n, xl, xr;
int a[maxn], b[maxn], mx[maxn * 4];
set<int> s;
void upd(int v, int l, int r){
	if(l + 1 == r){
		t[v] = a[l];
		mx[v] = b[l];
		return;
	}
	if((l + r) / 2 <= it)upd(v * 2 + 2, (l + r) / 2, r);
	else upd(v * 2 + 1, l, (l + r) / 2);
	t[v] = 1ll * t[v * 2 + 1] * t[v * 2 + 2] % mod;
	mx[v] = max(mx[v * 2 + 1], mx[v * 2 + 2]);
}
int gm(int v, int l, int r){
	if(xl <= l)return mx[v];
	if(r <= xl)return 0;
	return max(gm(v * 2 + 1, l, (l + r) / 2), gm(v * 2 + 2, (l + r) / 2, r));
}
int mlp(int v, int l, int r){
	if(r <= xl + 1)return t[v];
	if(xl < l) return 1;
	return 1ll * mlp(v * 2 + 1, l, (l + r) / 2) * mlp(v * 2 + 2, (l + r) / 2, r) % mod; 
}
int get(){
	int ans = 1, p = 1;
	if(s.empty()){
		xl = 0;
		return gm(0, 0, n);
	}
	auto i = --s.end();
	while(1){
		xl = *i;
		int nx = gm(0, 0, n);
		if(p <= nx){
			ans = 1ll * nx * mlp(0, 0, n) % mod;
		}
		if(1ll * p * a[xl] > inf)break;
		p *= a[xl];
		if(i == s.begin())break;
		--i;
	}
	return ans;
}
int init(int M, int x[], int y[]) {
	n = M;
	for(int i = 0; i < n; i++){
		a[i] = x[i], b[i] = y[i];
		it = i;
		upd(0, 0, n);
		if(a[i] != 1)s.insert(i);
	}
	return get();
}

int updateX(int pos, int val) {	
	if(a[pos] == val)return get();
	if(a[pos] == 1)s.insert(pos);
	else if(val == 1)s.erase(pos);
	it = pos;
	a[it] = val;
	upd(0, 0, n);
	return get();
}

int updateY(int pos, int val) {
	it = pos;
	b[it] = val;
	upd(0, 0, n);
	return get();
}


//void solve() {
	
//}

//int main() {
	//ios_base::sync_with_stdio(0);
	//cin.tie(0);
	//int times = 1;
	////cin >> times;
	//for(int i = 1; i <= times; i++) {
		//solve();
	//}
	//return 0;
//}


//3
//2 1 3
//3 4 1
//1
//2 1 2

//0
//0




//int main() {
	
	//int N;
	//cin >> N;

	//int *X = (int*)malloc(sizeof(int)*(unsigned int)N);
	//int *Y = (int*)malloc(sizeof(int)*(unsigned int)N);

	//for (int i = 0; i < N; i++) {
		//cin >> X[i];
	//}

	//for (int i = 0; i < N; i++) {
		//cin >> Y[i];
	//}		
	//int M;
	//cin >> M;
	//for (int i = 0; i < M; i++) {
		//int type; cin >> type;
		//int pos; cin >> pos;
		//int val; cin >> val; 

		//if (type == 1) {
			//cout << updateX(pos,val) << '\n';
		//} else if (type == 2) {
			//cout << updateY(pos,val) << '\n';
		//}
	//}

	//return 0;
//}

Compilation message (stderr)

horses.cpp: In function 'void upd(int, int, int)':
horses.cpp:31:43: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   31 |  t[v] = 1ll * t[v * 2 + 1] * t[v * 2 + 2] % mod;
      |         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~
horses.cpp: In function 'int mlp(int, int, int)':
horses.cpp:42:79: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   42 |  return 1ll * mlp(v * 2 + 1, l, (l + r) / 2) * mlp(v * 2 + 2, (l + r) / 2, r) % mod;
      |         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~
horses.cpp: In function 'int get()':
horses.cpp:55:34: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   55 |    ans = 1ll * nx * mlp(0, 0, n) % mod;
      |          ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~

• Subtask 1: 0 / 17
• Subtask 2: 0 / 17
• Subtask 3: 0 / 20
• Subtask 4: 0 / 23
• Subtask 5: 0 / 23