Submission #1218840

#	Time	Username	Problem	Language	Result	Execution time	Memory
1218840		vidux	Horses (IOI15_horses)	C++17	0 / 100	1595 ms	20020 KiB

horses

#include "horses.h"

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef pair<ll, ll> pll;
typedef vector<ll> vl;

const ll LLINF = 1e18;
const ll MOD = 1e9+7;

const int MAXN = 5e5+1000;
int n;
vl t(MAXN*2);
void build(vl &a) {
        for (int i = 0; i < n; i++) t[i+n] = a[i];
        for (int i = n-1; i > 0; i--) t[i] = t[i*2]*t[i*2+1];
}
void modify(ll i, ll v) {
        for (t[i += n] = v; i > 1; i /= 2) t[i/2] = t[i]*t[i^1];
}
ll query(int l, int r) { // [l, r)
        ll ans = 1;
        for (l += n, r += n; l < r; l >>= 1, r >>= 1) {
                if (l&1) ans = (ans*t[l++])%MOD;
                if (r&1) ans = (ans*t[--r])%MOD;
        }
        return ans;
}

vl x, y;
ll getBest() {
        ll ans = 0;
        ll mult = 1;
        for (int i = 0; i < n; i++) {
                mult = (mult*x[i])%MOD;
                ans = max(ans, (mult*y[i])%MOD);
        }
        //cout << ans << endl;
        return ans;
}

int init(int N, int X[], int Y[]) {
        n = N;
        x = vl(n);
        y = vl(n);
        for (int i = 0; i < n; i++) x[i] = X[i], y[i] = Y[i];
        getBest();
        return 0;
}

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

int updateY(int pos, int val) {
        y[pos] = val;
        return getBest();
}

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