oj.uz

Submission #43996

# Submission time Handle Problem Language Result Execution time Memory
43996 2018-03-29T09:35:47 Z zscoder Worst Reporter 3 (JOI18_worst_reporter3) C++17
100 / 100
 849 ms 11580 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
 
using namespace std;
using namespace __gnu_pbds;
 
#define fi first
#define se second
#define mp make_pair
#define pb push_back
#define fbo find_by_order
#define ook order_of_key
 
typedef long long ll;
typedef pair<ll,ll> ii;
typedef vector<int> vi;
typedef long double ld; 
typedef tree<ll, null_type, less<ll>, rb_tree_tag, tree_order_statistics_node_update> pbds;
typedef set<ll>::iterator sit;
typedef map<ll,ll>::iterator mit;

ll d[511111];
int n,q; 
ll period[511111];
vector<pair<ll,ii> > segments;

ll solve(ll t, ll x)
{
	//check IOI-chan separately :)
	ll ans = 0;
	if(t<=x) ans++;
	/*noob solution
	for(int i=1;i<=n;i++)
	{
		//calculate position after t seconds
		ll pos = -i + (t/period[i])*period[i];
		ans+=(pos<=x);
	}
	*/
	for(int i=0;i<segments.size();i++)
	{
		ll per = segments[i].fi; ll l = segments[i].se.fi; ll r = segments[i].se.se;
		ll extramoves = (t/per)*per;
		extramoves -= x;
		//count # of [l,r] which is >= extramoves
		if(l>=extramoves) ans+=(r-l+1);
		else if(r>=extramoves)
		{
			ans += (r-extramoves+1);
		}
	}
	return ans;
}

int main()
{
	ios_base::sync_with_stdio(0); cin.tie(0);
	cin>>n>>q;
	for(int i=1;i<=n;i++) cin>>d[i];
	period[1] = d[1];
	ll cur = d[1]; int pre = 1;
	for(int i = 2; i <= n; i++)
	{
		ll ext = (d[i] + cur - 1)/cur;
		period[i] = ext*cur;
		if(period[i]>cur)
		{
			segments.pb(mp(cur, mp(pre, i - 1)));
			pre = i;
		}
		cur = period[i];
	}
	segments.pb(mp(cur, mp(pre, n)));
	//do stupid solution first
	for(int i=0;i<q;i++)
	{
		ll t,l,r; cin>>t>>l>>r;
		cout<<solve(t,r)-solve(t,l-1)<<'\n';
	}
}

Compilation message

worst_reporter3.cpp: In function 'll solve(ll, ll)':
worst_reporter3.cpp:41:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<segments.size();i++)
              ~^~~~~~~~~~~~~~~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 342 ms 11256 KB Output is correct
2 Correct 343 ms 11256 KB Output is correct
3 Correct 325 ms 11552 KB Output is correct
4 Correct 324 ms 11552 KB Output is correct
5 Correct 333 ms 11552 KB Output is correct
6 Correct 329 ms 11552 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 11552 KB Output is correct
2 Correct 2 ms 11552 KB Output is correct
3 Correct 2 ms 11552 KB Output is correct
4 Correct 2 ms 11552 KB Output is correct
5 Correct 3 ms 11552 KB Output is correct
6 Correct 3 ms 11552 KB Output is correct

Subtask #3
81.0 / 81.0

# Verdict Execution time Memory Grader output
1 Correct 342 ms 11256 KB Output is correct
2 Correct 343 ms 11256 KB Output is correct
3 Correct 325 ms 11552 KB Output is correct
4 Correct 324 ms 11552 KB Output is correct
5 Correct 333 ms 11552 KB Output is correct
6 Correct 329 ms 11552 KB Output is correct
7 Correct 3 ms 11552 KB Output is correct
8 Correct 2 ms 11552 KB Output is correct
9 Correct 2 ms 11552 KB Output is correct
10 Correct 2 ms 11552 KB Output is correct
11 Correct 3 ms 11552 KB Output is correct
12 Correct 3 ms 11552 KB Output is correct
13 Correct 367 ms 11552 KB Output is correct
14 Correct 376 ms 11552 KB Output is correct
15 Correct 338 ms 11552 KB Output is correct
16 Correct 372 ms 11552 KB Output is correct
17 Correct 630 ms 11552 KB Output is correct
18 Correct 604 ms 11552 KB Output is correct
19 Correct 641 ms 11552 KB Output is correct
20 Correct 619 ms 11552 KB Output is correct
21 Correct 614 ms 11552 KB Output is correct
22 Correct 637 ms 11552 KB Output is correct
23 Correct 675 ms 11552 KB Output is correct
24 Correct 849 ms 11552 KB Output is correct
25 Correct 386 ms 11552 KB Output is correct
26 Correct 354 ms 11580 KB Output is correct
27 Correct 614 ms 11580 KB Output is correct
28 Correct 675 ms 11580 KB Output is correct
29 Correct 684 ms 11580 KB Output is correct
30 Correct 671 ms 11580 KB Output is correct
31 Correct 671 ms 11580 KB Output is correct
32 Correct 390 ms 11580 KB Output is correct
33 Correct 2 ms 11580 KB Output is correct