Submission #169471

#	Time	Username	Problem	Language	Result	Execution time	Memory
169471		abil	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++14	100 / 100	2134 ms	107284 KiB

sortbooks

#include <bits/stdc++.h>

#define fr first
#define sc second
#define pb push_back
#define mk make_pair
#define all(s) s.begin(),s.end()
//#define int long long

using namespace std;

const int N = (1e6 + 12);
const int mod = (1e9 + 7);
const int INF = (0x3f3f3f3f);

int a[N], pos[N], l[N], r[N], k[N], t[N * 4], ans[N];
vector<int > vec[N];

void update(int v,int tl,int tr,int pos,int val){
	if(tl == tr){
		t[v] = val;
		return;
	}
	int mid = (tl + tr) >> 1;
	if(pos <= mid){
		update(v + v, tl, mid, pos, val);
	}
	else{
		update(v + v + 1, mid + 1, tr, pos, val);
	}
	t[v] = max(t[v + v], t[v + v + 1]);
}

int get(int v,int tl,int tr,int ll,int rr){
	if(tl > rr || tr < ll){
		return 0;
	}
	if(ll <= tl && tr <= rr){
		return t[v];
	}
	int mid = (tl + tr) >> 1;
	return max(get(v + v, tl, mid, ll, rr), get(v + v + 1, mid + 1, tr, ll, rr));
}
main()
{
	int n, m;
	scanf("%d%d", &n, &m);
	for(int i = 1;i <= n; i++){
		scanf("%d", &a[i]);
		pos[i] = i - 1;
		while(pos[i] && a[pos[i]] <= a[i]){
			pos[i] = pos[pos[i]];
		}
	}
	for(int i = 1;i <= m; i++){
		scanf("%d%d%d", &l[i], &r[i], &k[i]);
		vec[r[i]].pb(i);
	}
	for(int i = 1;i <= n; i++){
		if(pos[i]){
			update(1, 1, n, pos[i], a[i] + a[pos[i]]);
		}
		for(auto to : vec[i]){
			ans[to] = (get(1, 1, n, l[to], r[to]) <= k[to] ? 1 : 0);
		}
	}
	for(int i = 1;i <= m; i++){
		printf("%d\n", ans[i]);
	}
}

Compilation message (stderr)

sortbooks.cpp:44:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main()
      ^
sortbooks.cpp: In function 'int main()':
sortbooks.cpp:47:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &n, &m);
  ~~~~~^~~~~~~~~~~~~~~~
sortbooks.cpp:49:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &a[i]);
   ~~~~~^~~~~~~~~~~~~
sortbooks.cpp:56:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d%d", &l[i], &r[i], &k[i]);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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