oj.uz

Submission #238141

# Submission time Handle Problem Language Result Execution time Memory
238141 2020-06-10T04:21:56 Z wwdd Palembang Bridges (APIO15_bridge) C++14
100 / 100
 578 ms 44004 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll,ll> pl;
typedef vector<ll> vl;
typedef vector<pl> vpl;
class ST {
	private:
		ll n;
		int h;
		vl st;
	public:
		ST(int n_) {
			h = 1;n = 1;
			while(n < n_) {
				n <<= 1;
				h++;
			}
			st.assign(2*n,0);
		}
		void up(ll p, ll val) {
			p += n;
			st[p] += val;
			while(p > 1) {
				st[p>>1] = st[p] + st[p^1];
				p >>= 1;
			}
		}
		ll get(int l, int r) {
			ll res = 0;
			for(l += n,r += n;l<r;l>>=1,r>>=1) {
				if(l&1) {
					res += st[l];
					l++;
				}
				if(r&1) {
					--r;
					res += st[r];
				}
			}
			return res;
		}
		int kth(int u) {
			int p = 1;
			for(int i=1;i<h;i++) {
				p <<= 1;
				if(st[p] < u) {
					u -= st[p];p++;
				}
			}
			return p-n;
		}
		inline ll size() {return n;}
};
vpl w;
ll wol() {
	vl wa;
	sort(w.begin(),w.end(),[&](const pl& a, const pl& b) {
			return a.first + a.second < b.first + b.second;
			});
	for(int i=0;i<w.size();i++) {
		wa.push_back(w[i].first);
		wa.push_back(w[i].second);
	}
	map<ll,ll> mu;
	sort(wa.begin(),wa.end());
	for(int i=0;i<wa.size();i++) {
		mu[wa[i]] = i;
	}
	vl rac(w.size()+1,0);
	int rid = 0;
	ST sa(wa.size()),sb(wa.size()),ra(wa.size()),rb(wa.size()),kt(wa.size());
	ll res = 1e18;
	for(int i=0;i<w.size();i++) {
		int ia = mu[w[i].first];
		int ib = mu[w[i].second];
		sa.up(ib,w[i].second);
		sb.up(ib,1);
		kt.up(ib,1);
		ra.up(ia,w[i].first);
		rb.up(ia,1);
		kt.up(ia,1);
		int mi = kt.kth(i+1);
		ll x = wa[mi];
		rac[i+1] += 2*(x*sb.get(0,mi)-sa.get(0,mi) + ra.get(mi,ra.size()) - x*rb.get(mi,rb.size()));
	}
	sa = ST(wa.size());
	sb = ST(wa.size());
	ra = ST(wa.size());
	rb = ST(wa.size());
	kt = ST(wa.size());
	for(int i=w.size()-1;i>=0;i--) {
		int ia = mu[w[i].first];
		int ib = mu[w[i].second];
		sa.up(ib,w[i].second);
		sb.up(ib,1);
		kt.up(ib,1);
		ra.up(ia,w[i].first);
		rb.up(ia,1);
		kt.up(ia,1);
		int mi = kt.kth(w.size()-i);
		ll x = wa[mi];
		rac[i] += 2*(x*sb.get(0,mi)-sa.get(0,mi) + ra.get(mi,ra.size()) - x*rb.get(mi,rb.size()));
	}
	for(int i=0;i<rac.size();i++) {
		res = min(res,rac[i]);
	}
	return res;
}
ll lol() {
	vl wa;
	for(int i=0;i<w.size();i++) {
		wa.push_back(w[i].first);
		wa.push_back(w[i].second);
	}
	sort(wa.begin(),wa.end());
	ll pos = wa[wa.size()/2];
	ll res = 0;
	for(int i=0;i<w.size();i++) {
		res += abs(w[i].first-pos) + abs(pos-w[i].second);
	}
	return res;
}
int main() {
	ios::sync_with_stdio(0);cin.tie(0);
	int k,n;
	cin >> k >> n;
	ll wad = 0;
	ll nev = 0;
	for(int i=0;i<n;i++) {
		char ca,cb;
		ll a,b;
		cin >> ca >> a >> cb >> b;
		if(ca == cb) {
			wad += abs(a-b);
		} else {
			wad++;
			nev += max(a,b)-min(a,b);
			w.push_back({min(a,b),max(a,b)});
		}
	}
	sort(w.begin(),w.end());
	ll res = -1;
	if(k == 1) {
		res = lol();
	} else {
		res = wol();
		res += nev;
	}
	cout << res+wad << '\n';
}

Compilation message

bridge.cpp: In function 'll wol()':
bridge.cpp:61:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<w.size();i++) {
              ~^~~~~~~~~
bridge.cpp:67:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<wa.size();i++) {
              ~^~~~~~~~~~
bridge.cpp:74:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<w.size();i++) {
              ~^~~~~~~~~
bridge.cpp:105:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<rac.size();i++) {
              ~^~~~~~~~~~~
bridge.cpp:71:6: warning: unused variable 'rid' [-Wunused-variable]
  int rid = 0;
      ^~~
bridge.cpp: In function 'll lol()':
bridge.cpp:112:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<w.size();i++) {
              ~^~~~~~~~~
bridge.cpp:119:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<w.size();i++) {
              ~^~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 5 ms 256 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 6 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 6 ms 384 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 6 ms 512 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 404 KB Output is correct
9 Correct 6 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Correct 30 ms 5748 KB Output is correct
13 Correct 63 ms 7276 KB Output is correct
14 Correct 48 ms 5996 KB Output is correct
15 Correct 37 ms 4216 KB Output is correct
16 Correct 38 ms 6636 KB Output is correct
17 Correct 48 ms 7276 KB Output is correct
18 Correct 45 ms 7020 KB Output is correct
19 Correct 53 ms 7272 KB Output is correct
20 Correct 40 ms 6888 KB Output is correct
21 Correct 51 ms 7144 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct

Subtask #4
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 5 ms 512 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 5 ms 640 KB Output is correct
14 Correct 6 ms 568 KB Output is correct
15 Correct 7 ms 768 KB Output is correct
16 Correct 5 ms 512 KB Output is correct
17 Correct 5 ms 512 KB Output is correct
18 Correct 5 ms 512 KB Output is correct
19 Correct 6 ms 640 KB Output is correct
20 Correct 6 ms 768 KB Output is correct
21 Correct 7 ms 768 KB Output is correct
22 Correct 6 ms 768 KB Output is correct
23 Correct 5 ms 616 KB Output is correct
24 Correct 9 ms 696 KB Output is correct

Subtask #5
37.0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 6 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 5 ms 640 KB Output is correct
14 Correct 6 ms 640 KB Output is correct
15 Correct 7 ms 664 KB Output is correct
16 Correct 5 ms 512 KB Output is correct
17 Correct 6 ms 640 KB Output is correct
18 Correct 6 ms 512 KB Output is correct
19 Correct 6 ms 640 KB Output is correct
20 Correct 7 ms 768 KB Output is correct
21 Correct 7 ms 800 KB Output is correct
22 Correct 7 ms 768 KB Output is correct
23 Correct 6 ms 640 KB Output is correct
24 Correct 6 ms 768 KB Output is correct
25 Correct 108 ms 29668 KB Output is correct
26 Correct 131 ms 30052 KB Output is correct
27 Correct 578 ms 42076 KB Output is correct
28 Correct 567 ms 44004 KB Output is correct
29 Correct 572 ms 43876 KB Output is correct
30 Correct 244 ms 22636 KB Output is correct
31 Correct 111 ms 30564 KB Output is correct
32 Correct 281 ms 43812 KB Output is correct
33 Correct 255 ms 43364 KB Output is correct
34 Correct 281 ms 43360 KB Output is correct
35 Correct 121 ms 30824 KB Output is correct
36 Correct 281 ms 43624 KB Output is correct
37 Correct 96 ms 29792 KB Output is correct