# |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
307593 |
2020-09-28T19:12:32 Z |
eggag32 |
Taxis (POI13_tak) |
C++17 |
|
173 ms |
13560 KB |
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
typedef vector<int> vi;
typedef pair<int, int> pi;
#define debug(x) cerr << #x << ": " << x << endl
#define debug2(x, y) debug(x), debug(y)
#define repn(i, a, b) for(int i = (int)(a); i < (int)(b); i++)
#define rep(i, a) for(int i = 0; i < (int)(a); i++)
#define all(v) v.begin(), v.end()
#define mp make_pair
#define pb push_back
#define lb lower_bound
#define ub upper_bound
#define fi first
#define se second
#define sq(x) ((x) * (x))
const int mxN = 5e5 + 5;
template<class T> T gcd(T a, T b){ return ((b == 0) ? a : gcd(b, a % b)); }
int n;
ll m, d;
ll x[mxN];
bool check(int g){
if(x[0] < (m - d)) return 0;
ll pos = 0LL;
int ch = 0;
rep(i, g) if(x[i] >= (m - d)) ch = i;
ll lm = d - ((x[ch] - (m - d)) / 2);
rep(i, g) if(i != ch){
ll cur = x[i];
cur -= abs(d - pos);
if(cur > 0) pos += cur;
if(pos >= lm) return 1;
}
if(pos >= lm) return 1;
return 0;
}
int main(){
ios_base::sync_with_stdio(false);
cin.tie(0);
//freopen("input.in", "r", stdin);
//freopen("output.out", "w", stdout);
cin >> m >> d >> n;
rep(i, n) cin >> x[i];
sort(x, x + n);
reverse(x, x + n);
int l = 1, r = n;
while(l < r){
int mid = (l + r) / 2;
if(check(mid)) r = mid;
else l = mid + 1;
}
if(!check(l)) l = 0;
cout << l << endl;
return 0;
}
/*
Things to look out for:
- Integer overflows
- Array bounds
- Special cases
Be careful!
*/
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
384 KB |
Output is correct |
2 |
Correct |
0 ms |
384 KB |
Output is correct |
3 |
Correct |
1 ms |
384 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
384 KB |
Output is correct |
2 |
Correct |
1 ms |
384 KB |
Output is correct |
3 |
Correct |
0 ms |
384 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
384 KB |
Output is correct |
2 |
Correct |
1 ms |
384 KB |
Output is correct |
3 |
Correct |
1 ms |
384 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
512 KB |
Output is correct |
2 |
Correct |
2 ms |
384 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
12 ms |
1280 KB |
Output is correct |
2 |
Correct |
3 ms |
632 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
15 ms |
1784 KB |
Output is correct |
2 |
Correct |
19 ms |
1664 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
26 ms |
2560 KB |
Output is correct |
2 |
Correct |
69 ms |
5400 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
77 ms |
7056 KB |
Output is correct |
2 |
Correct |
105 ms |
8824 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
173 ms |
13560 KB |
Output is correct |
2 |
Correct |
121 ms |
10616 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
109 ms |
13560 KB |
Output is correct |
2 |
Correct |
164 ms |
13176 KB |
Output is correct |