Submission #893868

#	Time	Username	Problem	Language	Result	Execution time	Memory
893868		vjudge1	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++17	100 / 100	1337 ms	109604 KiB

sortbooks

#include <bits/stdc++.h>
using namespace std;
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
  
#define ordered_set tree<int, null_type,less<int>, rb_tree_tag,tree_order_statistics_node_update>
 
// #pragma GCC optimize("Ofast,unroll-loops,fast-math")
// #pragma GCC target("popcnt")


typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair<ll,ll> pll;
 
#define sz size()
#define ff first
#define ss second
#define all(a) a.begin(),a.end()
#define pb push_back

const int mod = ll(1e9)+7; //(b + (a%b)) % b (to mod -1%(10^9+7) correctly in c++ its -1 but its suppose to be 10^9+6
const ll MOD = 998244353;  // (a%mod)*(binpow(b,mod-2,mod) = (a/b)%mod
const int N = ll(1e6)+100;
const long long inf = 2e18;
const long double eps = 1e-15L;
 
ll lcm(ll a, ll b) { return (a / __gcd(a,b))*b; }

ll binpow(ll a, ll b, ll m) { ll res=1; a %= m; while(b>0){ if(b&1)res=(res * a) % m; a=(a * a) % m; b/=2; } return res%m;}


void Freopen(string Key){ freopen((Key+".in").c_str(), "r", stdin); freopen((Key+".out").c_str(), "w", stdout); }

int n, m, a[N], ans[N], pos[N], t[N*4];
int ql[N], qr[N], qk[N];
vector<int> q[N];

void build(int v, int tl, int tr) {
	if(tl == tr) {
		t[v] = 0;
		return;
	}
	int tm = (tl + tr) / 2;
	build(v + v, tl, tm);
	build(v + v + 1, tm + 1, tr);
	t[v] = max(t[v + v], t[v + v + 1]);
}


void update(int v, int tl, int tr, int p, int x) {
	if(tl == tr) {
		t[v] = x;
		return;
	}
	int tm = (tl + tr) / 2;
	if(p <= tm) update(v + v, tl, tm, p, x);
	else update(v + v + 1, tm + 1, tr, p, x);
	t[v] = max(t[v + v], t[v + v + 1]);
}

int get(int v, int tl, int tr, int l, int r) {
	if(tl > r || l > tr) return 0;
	if(l <= tl && tr <= r) return t[v];
	int tm = (tl + tr) / 2;
	return max(get(v + v, tl, tm, l, r), get(v + v + 1, tm + 1, tr, l, r));
}

void Baizho() {	
	cin>>n>>m;
	for(int i = 1; i <= n; i ++) {
		cin>>a[i];
	}
	build(1, 1, n);
	for(int i = 1; i <= m; i ++) {
		cin>>ql[i]>>qr[i]>>qk[i];
		q[qr[i]].pb(i);
	}
	vector<int> st;
	for(int i = 1; i <= n; i ++) {
		while(!st.empty() && a[st.back()] <= a[i]) st.pop_back();
		if(!st.empty()) pos[i] = st.back();
		st.pb(i);
	}
	for(int i = 1; i <= n; i ++) {
		if(pos[i]) {
			update(1, 1, n, pos[i], a[pos[i]] + a[i]);	
		}
		for(auto j : q[i]) {
			ans[j] = (get(1, 1, n, ql[j], qr[j]) <= qk[j]);
		}
	}
	for(int i = 1; i <= m; i ++) cout<<ans[i]<<"\n";
	
}
 
signed main() {		
 
    ios_base::sync_with_stdio(false);   
    cin.tie(0);cout.tie(0); 
//   	precalc();
   	
    int ttt = 1;
//    cin>>ttt;

    for(int i=1; i<=ttt; i++) { Baizho(); }
}

Compilation message (stderr)

sortbooks.cpp: In function 'void Freopen(std::string)':
sortbooks.cpp:35:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   35 | void Freopen(string Key){ freopen((Key+".in").c_str(), "r", stdin); freopen((Key+".out").c_str(), "w", stdout); }
      |                           ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
sortbooks.cpp:35:76: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   35 | void Freopen(string Key){ freopen((Key+".in").c_str(), "r", stdin); freopen((Key+".out").c_str(), "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