Submission #470799

#	Time	Username	Problem	Language	Result	Execution time	Memory
470799		Killer2501	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++14	100 / 100	1275 ms	125576 KiB

sortbooks

#include <bits/stdc++.h>
#define ll long long
#define pb push_back
#define task "tests"
#define pll pair<ll, ll>
#define pi pair<ll, pll>
#define fi first
#define se second

using namespace std;
const ll mod = 1e9;
const ll N = 1e6+55;
const int base = 313;
ll n, m, t, k, T, ans, q, tong, c[N], a[N], b[N], h[N], d[N], lab[N], fe[N];
vector<ll> adj[N], kq;
ll pw(ll k, ll n)
{
    ll total = 1;
    for(; n; n >>= 1)
    {
        if(n & 1)total = total * k % mod;
        k = k * k % mod;
    }
    return total;
}
void add(ll id, ll x)
{
    for(; id; id -= id & -id)fe[id] = max(fe[id], x);
}
ll get(ll id)
{
    ll total = 0;
    for(; id <= n; id += id & -id)total = max(total, fe[id]);
    return total;
}
void sol()
{
    cin >> n >> m;
    for(int i = 1; i <= n; i ++)cin >> a[i];
    for(int i = 1; i <= m; i ++)
    {
        cin >> b[i] >> c[i] >> h[i];
        adj[c[i]].pb(i);
    }
    for(int i = 1; i <= n; i ++)
    {
        while(!kq.empty() && a[i] >= a[kq.back()])kq.pop_back();
        k = kq.empty() ? 0 : kq.back();
        add(k, a[k]+a[i]);
        for(ll j: adj[i])
        {
            d[j] = (get(b[j]) <= h[j]);
        }
        kq.pb(i);
    }
    for(int i = 1; i <= m; i ++)cout << d[i] << '\n';
}
int main()
{
    if(fopen(task".in", "r"))
    {
       freopen(task".in", "r", stdin);
       freopen(task".out", "w", stdout);
    }
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int ntest = 1;
    //cin >> ntest;
    while(ntest -- > 0)
    sol();
}

Compilation message (stderr)

sortbooks.cpp: In function 'int main()':
sortbooks.cpp:62:15: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   62 |        freopen(task".in", "r", stdin);
      |        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
sortbooks.cpp:63:15: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   63 |        freopen(task".out", "w", stdout);
      |        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 8 / 8
• Subtask 2: 9 / 9
• Subtask 3: 13 / 13
• Subtask 4: 17 / 17
• Subtask 5: 30 / 30
• Subtask 6: 23 / 23