Submission #485065

#	Time	Username	Problem	Language	Result	Execution time	Memory
485065		socho	Fire (JOI20_ho_t5)	C++14	7 / 100	149 ms	13644 KiB

ho_t5

/*
 Going for Subtask 3
*/
#include <bits/stdc++.h>
using namespace std;
void fast() {
	ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
}
void ran() {
	srand(chrono::steady_clock::now().time_since_epoch().count());
}
long long get_rand() {
	long long a = rand();
	long long b = rand();
	return a * (RAND_MAX + 1ll) + b;
}
void usaco() {
	freopen("problem.in", "r", stdin); 
	freopen("problem.out", "w", stdout);
}
template<typename T>
using min_pq = priority_queue<T, vector<T>, greater<T>>;
#define endl '\n'
// #define double long double
#define int long long
// const int MOD = 1000 * 1000 * 1000 + 7;
// const int MOD = 998244353;
// #define cerr if(0) cerr
#define debug(x) cerr << #x << ": " << x << endl;

int n, q;
const int MXN = 200005;
int arr[MXN];
int narr[MXN];
int seg[MXN * 4];

void build(int ind, int l, int r) {
	if (l == r) {
		seg[ind] = arr[l];
		return;
	}
	int m = (l + r) / 2;
	build(ind*2, l, m);
	build(ind*2+1, m+1, r);
	seg[ind] = max(seg[ind*2], seg[ind*2+1]);
}

int query(int ind, int l, int r, int ql, int qr) {
	if (ql <= l && r <= qr) return seg[ind];
	if (ql > r || qr < l) return INT_MIN;
	int m = (l + r) / 2;
	return max(query(ind*2, l, m, ql, qr), query(ind*2+1, m+1, r, ql, qr));
}

signed main() {

	ran(); fast();

	cin >> n >> q;
	for (int i=1; i<=n; i++) cin >> arr[i];
	
	build(1, 1, n);
	
	int tm = -1;
	
	// vector<pair<int, pair<int, int>>> proc;
	for (int i=0; i<q; i++) {
		int t, l, r;
		cin >> t >> l >> r;
		cout << query(1, 1, n, max(1ll, l-t), r) << endl;
	}
	
	
	

}

Compilation message (stderr)

ho_t5.cpp: In function 'int main()':
ho_t5.cpp:64:6: warning: unused variable 'tm' [-Wunused-variable]
   64 |  int tm = -1;
      |      ^~
ho_t5.cpp: In function 'void usaco()':
ho_t5.cpp:18:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |  freopen("problem.in", "r", stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
ho_t5.cpp:19:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   19 |  freopen("problem.out", "w", stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 1
• Subtask 2: 0 / 6
• Subtask 3: 7 / 7
• Subtask 4: 0 / 6
• Subtask 5: 0 / 80