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Submission #1105806

# Submission time Handle Problem Language Result Execution time Memory
1105806 2024-10-27T22:51:49 Z _rain_ Palembang Bridges (APIO15_bridge) C++14
22 / 100
 93 ms 12464 KB 
#include<bits/stdc++.h>
using namespace std;

typedef long long ll;
#define name "main"
#define int long long
typedef pair<int,int> ii;
#define fi first 
#define se second

const int N=(int)1e5;
bool print=false;
vector<ii>sett;
vector<ll>nen;
int n,k,cnt=0;
ll f[N+2];
bool used[N*2+2];

bool cmp(ii a,ii b){
	return a.fi+a.se<b.fi+b.se;
}
class BIT{
public:
	vector<ll>tot;
	vector<int> cnt,one;
	int n;
	void init(int _n){
		n=_n;
		tot.assign(_n+2,0);
		cnt.assign(_n+2,0);
		one.assign(_n+2,0);
		return;
	}
	void upd_tot(int id,int val){
		for(;id<=n;id+=(id&(-id)))
			tot[id]+=val;
		return;
	}
	void upd_cnt(int id,int val){
		for(;id<=n;id+=(id&(-id)))
			cnt[id]+=val;
		return;
	}
	void upd_one(int id,int val){
		for(;id<=n;id+=(id&(-id)))
			one[id]+=val;
	}
	int Get_tot(int id){
		ll sum=0;
		for(;id;id-=(id&(-id)))
			sum+=tot[id];
		return sum;
	}
	ll Get_cnt(int id){
		ll sum=0;
		for(;id;id-=(id&(-id)))
			sum+=cnt[id];

		return sum;
	}
	ll Get_one(int id){
		ll sum=0;
		for(;id;id-=(id&(-id)))
			sum+=one[id];
		return sum;
	}
	ll sum_range(int t,int l,int r){
		if (t==1){
			return Get_tot(r)-Get_tot(l-1);
		}
		if (t==2){
			return Get_cnt(r)-Get_cnt(l-1);
		}
		if (t==3){
			return Get_one(r)-Get_one(l-1);	
		}
	}
};	
BIT tree;

ll F(int i){
	int l=1,r=nen.size(),p=1;
	while(l<=r){
		int m=(l+r)>>1;
		if (tree.sum_range(2,1,m)<=(cnt+1)/2){
			l=m+1,p=m;
		}
		else r=m-1;
	}
	return nen[p]*tree.sum_range(2,1,p)-tree.sum_range(1,1,p)+tree.sum_range(1,p+1,nen.size())-nen[p]*tree.sum_range(2,p+1,nen.size())+(ll)i;
}

int32_t main(){
	ios::sync_with_stdio(0);
	cin.tie(0); cout.tie(0);

	cin>>k>>n;
	ll ans=0;
	nen.push_back(-1);
	for (int i=1;i<=n;++i){
		char c1,c2; int a,b;
		cin>>c1>>a>>c2>>b;
		if (c1==c2) ans+=abs(a-b);
		else {
			nen.push_back(a);
			nen.push_back(b);
			sett.push_back({a,b});
		}
	}
	sort(nen.begin(),nen.end()); nen.resize(unique(nen.begin(),nen.end())-nen.begin());
	sort(sett.begin(),sett.end(),cmp);
	tree.init(nen.size());
	for (int i=1;i<=sett.size();++i){
		int a=sett[i-1].fi,b=sett[i-1].se;
		a=upper_bound(nen.begin(),nen.end(),a)-nen.begin();
		b=upper_bound(nen.begin(),nen.end(),b)-nen.begin();
		tree.upd_cnt(a,1),tree.upd_cnt(b,1);
		tree.upd_tot(a,nen[a-1]),tree.upd_tot(b,nen[b-1]);
		cnt+=2;
		f[i]=F(i);
	}
	if (k==1) ans=ans+f[sett.size()];
	cout<<ans;
	exit(0);
}

Compilation message

bridge.cpp: In function 'int32_t main()':
bridge.cpp:113:16: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  113 |  for (int i=1;i<=sett.size();++i){
      |               ~^~~~~~~~~~~~~
bridge.cpp: In member function 'll BIT::sum_range(long long int, long long int, long long int)':
bridge.cpp:77:2: warning: control reaches end of non-void function [-Wreturn-type]
   77 |  }
      |  ^

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 2 ms 348 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 1 ms 408 KB Output is correct
11 Correct 1 ms 336 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 336 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 1 ms 336 KB Output is correct
11 Correct 1 ms 536 KB Output is correct
12 Correct 22 ms 6328 KB Output is correct
13 Correct 93 ms 12456 KB Output is correct
14 Correct 52 ms 6840 KB Output is correct
15 Correct 58 ms 7092 KB Output is correct
16 Correct 24 ms 7204 KB Output is correct
17 Correct 59 ms 12464 KB Output is correct
18 Correct 64 ms 12200 KB Output is correct
19 Correct 74 ms 12192 KB Output is correct
20 Correct 26 ms 7348 KB Output is correct
21 Correct 68 ms 12244 KB Output is correct

Subtask #3
0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Incorrect 1 ms 336 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #4
0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 504 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Incorrect 1 ms 336 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #5
0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 504 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Incorrect 1 ms 336 KB Output isn't correct
4 Halted 0 ms 0 KB -