Submission #1260256

#	Time	Username	Problem	Language	Result	Execution time	Memory
1260256		tminh	Pilot (NOI19_pilot)	C++20	100 / 100	267 ms	27180 KiB

pilot

#include "bits/stdc++.h"
using namespace std;

#define task ""
#define ll long long
#define endl '\n'
#define fi first
#define se second
#define vall(a) (a).begin(), (a).end()
#define sze(a) (int)a.size()
#define pii pair<int, int>
#define pll pair<ll, ll>


#define ep emplace_back
#define pb push_back
#define pf push_front


const ll mod = 1e9 + 7;
const int N = 1e6 + 5;
const ll oo = 1e18;

bool START;

int n, q, a[N], l[N], r[N];
ll pre[N];
stack<int> st;

inline void solve() {
	for (int i = 1; i <= n; ++i) {
		while(!st.empty() && a[i] > a[st.top()]) st.pop();
		l[i] = (st.empty() ? 0 : st.top());
		st.push(i);
	}
	while(!st.empty()) st.pop();
	
	for (int i = n; i >= 1; --i) {
		while(!st.empty() && a[i] >= a[st.top()]) st.pop();
		r[i] = (st.empty() ? n + 1 : st.top());
		st.push(i);
	}
	for (int i = 1; i <= n; ++i) pre[a[i]] += 1ll * (i - l[i]) * (r[i] - i);
		
	
	for (int i = 1; i < N; ++i) {
		// cout << i << " " << pre[i] << endl;
		pre[i] += pre[i - 1];
	}
	while(q--) {
		int x; cin >> x;
		cout << pre[x] << endl;
	}
}


inline void input() {
    cin >> n >> q;
    for (int i = 1; i <= n; ++i) cin >> a[i];
    	
    return solve();
}
bool END;

int main() {
    if(fopen(task ".inp", "r")) {
        freopen(task ".inp", "r", stdin);
        freopen(task ".out", "w", stdout);
    }
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr); cout.tie(nullptr);

    input();
    
    
    cerr << endl << "Time elapsed: " << 1.0 * clock() / CLOCKS_PER_SEC << 's' << endl;
    cerr << "Memory: " << fabs ((&END - &START)) / 1048576.0 << "MB\n";
    return 0;
}

Compilation message (stderr)

pilot.cpp: In function 'int main()':
pilot.cpp:67:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   67 |         freopen(task ".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
pilot.cpp:68:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   68 |         freopen(task ".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 3 / 3
• Subtask 2: 10 / 10
• Subtask 3: 12 / 12
• Subtask 4: 15 / 15
• Subtask 5: 5 / 5
• Subtask 6: 9 / 9
• Subtask 7: 14 / 14
• Subtask 8: 10 / 10
• Subtask 9: 11 / 11
• Subtask 10: 11 / 11