Submission #890333

#	Time	Username	Problem	Language	Result	Execution time	Memory
890333		vjudge1	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++17	17 / 100	103 ms	39252 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(2e5)+10;
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], u[N], sta[20][N], LOG[N], ans[N];
int ql[N], qr[N], qk[N];
vector<int> q[N];

int getmx (int l, int r) {
	if(l > r) return 0;
	int j = LOG[r - l + 1];
	return max(sta[j][l], sta[j][r-(1<<j)+1]);
}

struct tre {
	int mx, ans;
} t[N * 4];

tre combine(tre a, tre b) {
	tre c; 
	c.mx = max(a.mx, b.mx);
	c.ans = max(a.ans, b.ans);
	return c;
}

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

void push(int v, int tl, int tr){
	if(u[v] != -1) {
		t[v].ans = t[v].mx + u[v];
		if(tl != tr) {
			u[v + v] = u[v];
			u[v + v + 1] = u[v];
		}
		u[v] = -1;
	}
} 

void update(int v, int tl, int tr, int l, int r, int x) {
	push(v, tl, tr);
	if(tl > r || l > tr) return;
	if(l <= tl && tr <= r) {
		u[v] = x;
		push(v, tl, tr);
		return;
	}
	int tm = (tl + tr) / 2;
	update(v + v, tl, tm, l, r, x);
	update(v + v + 1, tm + 1, tr, l, r, x);
	t[v] = combine(t[v + v], t[v + v + 1]);
}

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

void Baizho() {	
	for(int i = 2; i < N; i ++) LOG[i] = LOG[i / 2] + 1;
	cin>>n>>m;
	for(int i = 1; i <= n; i ++) {
		cin>>a[i];
		sta[0][i] = a[i];
	}
	build(1, 1, n);
	for(int j = 1; j <= 19; j ++) {
		for(int i = 1; i+(1<<j)-1 <= n; i ++) {
			sta[j][i] = max(sta[j-1][i], sta[j-1][i+(1<<j-1)]);
		}
	}
	for(int i = 1; i <= m; i ++) {
		cin>>ql[i]>>qr[i]>>qk[i];
		q[ql[i]].pb(i);
	}
	for(int i = n; i >= 1; i --) {
		int l = i + 1, r = i;
		int bl = i + 1, br = n;
		while(bl <= br) {
			int mid = (bl + br) / 2;
			if(getmx(i + 1, mid) < a[i]) bl = mid + 1, r = mid;
			else br = mid - 1;
		}
		if(l <= r) {
			update(1, 1, n, l, r, a[i]);
//			cout<<i<<" "<<l<<" "<<r<<"\n";
		}
		for(auto j : q[i]) {
			ans[j] = (get(1, 1, n, ql[j], qr[j]).ans <= 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 Baizho()':
sortbooks.cpp:113:49: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
  113 |    sta[j][i] = max(sta[j-1][i], sta[j-1][i+(1<<j-1)]);
      |                                                ~^~
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: 0 / 13
• Subtask 4: 0 / 17
• Subtask 5: 0 / 30
• Subtask 6: 0 / 23