oj.uz

Submission #1010554

# Submission time Handle Problem Language Result Execution time Memory
1010554 2024-06-29T08:03:18 Z dozer Fish 3 (JOI24_fish3) C++14
9 / 100
 1336 ms 47188 KB 
#include <bits/stdc++.h>
using namespace std;
#define sp " "
#define endl "\n";
#define fastio() cin.tie(0), ios_base::sync_with_stdio(0)
#define pb push_back
#define pii pair<int, int>
#define st first
#define nd second
#define N 200005
#define LL node * 2
#define RR node * 2 + 1
#define mid (l + r) / 2
#define LOGN 20
#define S 2
#define int long long

const int modulo = 1e9 + 7;
const long long INF = 2e18 + 7;

vector<int> gaps[N], pre[N];
int last[N], ans[N];

int32_t main()
{
	fastio();


	int n, d;
	cin>>n>>d;
	vector<int> arr(n + 5, 0);
	for (int i = 1; i <= n; i++)
		cin>>arr[i];

	for (int i = 1; i <= n; i++){
		if (i % S == 0){
			int curr = arr[i];
			for (int j = i - 1; j > i - S; j--){
				int diff = max((int)0, arr[j] - curr);
				int cnt = (diff + d - 1) / d;
				ans[i] += cnt;
				int tmp = arr[j] - cnt * d;
				int gap = (curr - tmp) / d;
				if (gaps[i].empty()) gaps[i].pb(gap);
				else gaps[i].pb(gaps[i].back() + gap);
				if (pre[i].empty()) pre[i].pb(gaps[i].back());
				else pre[i].pb(pre[i].back() + gaps[i].back());
				curr = tmp;
			}
			last[i] = curr;
			reverse(gaps[i].begin(), gaps[i].end());
		}
	}

	auto solve = [&](int l, int r){
		int curr = arr[r];
		int res = 0;
		while(r >= l && r % S != 0){
			int diff = max((int)0, arr[r] - curr);
			int cnt = (diff + d - 1) / d;
			int tmp = arr[r] - d * cnt;
			res += cnt;
			curr = tmp;
			r--;
		}

		/*
		//cout<<r<<sp<<res<<endl;
		while(r - S >= l){
			res += ans[r];
			if (curr >= arr[r]){
				curr = last[r];
				r -= S;
			}
			else{
				int diff = arr[r] - curr;
				int cnt = (diff + d - 1) / d;
				res += cnt;
				int pos = lower_bound(gaps[r].begin(), gaps[r].end(), cnt) - gaps[r].begin();
				curr = last[r];

				if (pos == gaps[r].size()){
					pos--;
					curr -= (cnt - gaps[r][pos]) * d;
				}
				int sz = pos + 1;
				res += cnt * sz;
				res -= pre[r][pos];
				r -= S;
			}
		}
	*/
		//cout<<r<<sp<<res<<sp<<curr<<endl;
		while(r >= l){
			int diff = max((int)0, arr[r] - curr);
			int cnt = (diff + d - 1) / d;
			res += cnt;
			curr = arr[r] - cnt * d;
			r--;
		}

		if (curr < 0) return (int)-1;
		return res;
	};


	int q;
	cin>>q;
	while(q--){
		int l, r;
		cin>>l>>r;
		cout<<solve(l, r)<<endl;
	}

	cerr << "time taken : " << (float)clock() / CLOCKS_PER_SEC << " seconds\n";
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9820 KB Output is correct
2 Correct 5 ms 9804 KB Output is correct
3 Correct 5 ms 9820 KB Output is correct
4 Correct 23 ms 10056 KB Output is correct
5 Correct 21 ms 10072 KB Output is correct
6 Correct 17 ms 9820 KB Output is correct
7 Correct 13 ms 9816 KB Output is correct
8 Correct 21 ms 9820 KB Output is correct
9 Correct 21 ms 9820 KB Output is correct
10 Correct 22 ms 9948 KB Output is correct
11 Correct 21 ms 10072 KB Output is correct
12 Correct 19 ms 10076 KB Output is correct
13 Correct 20 ms 10096 KB Output is correct

Subtask #2
0 / 7.0

# Verdict Execution time Memory Grader output
1 Runtime error 45 ms 43444 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #3
0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 1336 ms 14500 KB Output is correct
2 Runtime error 54 ms 47188 KB Execution killed with signal 11
3 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Runtime error 49 ms 43268 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #5
0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9820 KB Output is correct
2 Correct 5 ms 9804 KB Output is correct
3 Correct 5 ms 9820 KB Output is correct
4 Correct 23 ms 10056 KB Output is correct
5 Correct 21 ms 10072 KB Output is correct
6 Correct 17 ms 9820 KB Output is correct
7 Correct 13 ms 9816 KB Output is correct
8 Correct 21 ms 9820 KB Output is correct
9 Correct 21 ms 9820 KB Output is correct
10 Correct 22 ms 9948 KB Output is correct
11 Correct 21 ms 10072 KB Output is correct
12 Correct 19 ms 10076 KB Output is correct
13 Correct 20 ms 10096 KB Output is correct
14 Runtime error 45 ms 43444 KB Execution killed with signal 11
15 Halted 0 ms 0 KB -