Submission #1004158

#	Time	Username	Problem	Language	Result	Execution time	Memory
1004158		rahidilbayramli	Horses (IOI15_horses)	C++17	17 / 100	72 ms	17496 KiB

horses

#include "horses.h"
#pragma GCC optimize("-O3")
#include<bits/stdc++.h>
#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/tree_policy.hpp>
#define ll int
#define ld long double
#define vl vector<ll>
#define vi vector<int>
#define pii pair<int, int>
#define pll pair<ll, ll>
#define all(v) v.begin(), v.end()
#define rall(v) v.rbegin(), v.rend()
#define pb push_back
#define p_b pop_back
#define f first
#define s second
using namespace std;
using namespace __gnu_pbds;
typedef tree<int, null_type, less_equal<int>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;
const ll sz = 5e5+5, mod = 1e9+7;
ll a[sz], b[sz], segtree[4*sz], segtree2[4*sz], n;
void build(ll v, ll l, ll r)
{
    if(l == r)
    {
        segtree[v] = a[l];
        return;
    }
    else
    {
        ll mid = (l + r) / 2;
        build(2*v, l, mid);
        build(2*v+1, mid+1, r);
        segtree[v] = segtree[2*v] * segtree[2*v+1];
        if(segtree[v] >= mod)
            segtree[v] -= mod;
    }
}
void update(ll v, ll l, ll r, ll idx, ll val)
{
    if(l == r)
        segtree[v] = val;
    else
    {
        ll mid = (l + r) / 2;
        if(idx <= mid)
            update(2*v, l, mid, idx, val);
        else
            update(2*v+1, mid+1, r, idx, val);
        segtree[v] = segtree[2*v] * segtree[2*v+1];
        if(segtree[v] >= mod)
            segtree[v] -= mod;
    }
}
ll findans(ll v, ll l, ll r, ll tl, ll tr)
{
    if(tl > tr)
        return 1;
    if(l == tl && r == tr)
        return segtree[v];
    else
    {
        ll mid = (l + r) / 2;
        ll lans = findans(2*v, l, mid, tl, min(mid, tr));
        ll rans = findans(2*v+1, mid+1, r, max(mid+1, tl), tr);
        ll f = lans * rans;
        if(f >= mod)
            f -= mod;
        return f;
    }
}
void build2(ll v, ll l, ll r)
{
    if(l == r){
        segtree2[v] = findans(1, 1, n, 1, l) * b[l];
        if(segtree2[v] >= mod)
            segtree2[v] -= mod;
        return;
    }
    ll mid = (l + r) / 2;
    build2(2*v, l, mid);
    build2(2*v+1, mid+1, r);
    segtree2[v] = max(segtree2[2*v], segtree2[2*v+1]);
}
void update2(ll v, ll l, ll r, ll idx, ll val)
{
    if(l == r)
    {
        segtree2[v] = findans(1, 1, n, 1, l) * val;
        if(segtree2[v] >= mod)
            segtree2[v] -= mod;
        return;
    }
    else
    {
        ll mid = (l + r) / 2;
        if(idx <= mid)
            update2(2*v, l, mid, idx, val);
        else
            update2(2*v+1, mid+1, r, idx, val);
        segtree2[v] = max(segtree2[2*v], segtree2[2*v+1]);
    }
}
ll findans2(ll v, ll l, ll r, ll tl, ll tr)
{
    if(tl > tr)
        return LLONG_MIN;
    if(l == tl && r == tr)
        return segtree2[v];
    else
    {
        ll mid = (l + r) / 2;
        ll lans = findans2(2*v, l, mid, tl, min(mid, tr));
        ll rans = findans2(2*v+1, mid+1, r, max(mid+1, tl), tr);
        return max(lans, rans);
    }
}
ll init(ll N, ll X[], ll Y[]) {
	n = N;
	for(ll i = 1; i <= n; i++)
    {
        a[i] = X[i-1];
        b[i] = Y[i-1];
    }
    build(1, 1, n);
    build2(1, 1, n);
    return findans2(1, 1, n, 1, n) % mod;
}
ll updateX(ll pos, ll val) {
	pos++;
	update(1, 1, n, pos, val);
	return findans(1, 1, n, 1, n);
}
ll updateY(ll pos, ll val) {
	pos++;
	update2(1, 1, n, pos, val);
	return findans2(1, 1, n, 1, n);
}

Compilation message (stderr)

horses.cpp: In function 'int findans2(int, int, int, int, int)':
horses.cpp:108:16: warning: overflow in conversion from 'long long int' to 'int' changes value from '-9223372036854775808' to '0' [-Woverflow]
  108 |         return LLONG_MIN;
      |                ^~~~~~~~~

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