Submission #1158504

#	Time	Username	Problem	Language	Result	Execution time	Memory
1158504		zhasyn	Horses (IOI15_horses)	C++20	17 / 100	1595 ms	8252 KiB

horses

#include <bits/stdc++.h>
#include "horses.h"
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define pb push_back
#define pf push_front
using namespace std;
using namespace __gnu_pbds;
#define F first
#define S second
typedef long long ll;
#define pii pair <int, int>
#define pll pair <ll, ll>
typedef long double ld;
const ll N = 5 * 1e5 + 100, M = 2 * 1e6 + 100, len = 21, inf = 1e18;
const ll mod = 1e9 + 7;
ll um(ll a, ll b){
	return (1LL * a * b) % mod;
}
ll subr(ll a, ll b){
	return ((1LL * a - b) % mod + mod) % mod;
}
typedef tree<int,null_type,less_equal<int>,rb_tree_tag,tree_order_statistics_node_update>o_set;
int x[N], p[N], n;
ll calc(){
    int j = n - 1, mx = p[n - 1] * x[n - 1];
    for(int i = n - 2; i >= 0; i--){
        if(mx > 1e9) break;
        if(p[i] > mx) j = i;
        mx = max(mx, p[i]) * x[i];
    }
    ll xx =1;
    for(int i = 0; i <= j; i++){
        xx = um(xx, x[i]);
    }
	return um(xx, p[j]);
}
int init(int nx, int xx[], int pp[]) {
    n = nx;
    for(int i = 0; i < n; i++){
        x[i] = xx[i];
        p[i] = pp[i];
    }
    return calc();
}

int updateX(int pos, int val) {
    x[pos] = val;
	return calc();
}

int updateY(int pos, int val) {
    p[pos] = val;
	return calc();
}

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