oj.uz

Submission #151134

# Submission time Handle Problem Language Result Execution time Memory
151134 2019-09-01T20:29:47 Z TadijaSebez Bulldozer (JOI17_bulldozer) C++11
25 / 100
 2000 ms 71052 KB 
#pragma GCC optimize("Ofast")
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back
#define mp make_pair
#define mt make_tuple
const int N=2048;
const int M=2*N;
ll l[M],r[M],sum[M],ans[M];
int A[N];
void pull(int c)
{
	ans[c]=max(max(ans[c<<1],ans[c<<1|1]),r[c<<1]+l[c<<1|1]);
	l[c]=max(l[c<<1],sum[c<<1]+l[c<<1|1]);
	r[c]=max(r[c<<1|1],sum[c<<1|1]+r[c<<1]);
	sum[c]=sum[c<<1]+sum[c<<1|1];
}
void Build()
{
	for(int i=N;i<M;i++) sum[i]=A[i-N],l[i]=r[i]=ans[i]=max(0,A[i-N]);
	for(int i=N-1;i;i--) pull(i);
	/*if(ss==se){ sum[c]=A[ss];l[c]=r[c]=ans[c]=max(0,A[ss]);return;}
	int mid=ss+se>>1;
	Build(c<<1,ss,mid);
	Build(c<<1|1,mid+1,se);
	pull(c);*/
}
void Set(int qi, int x)
{
	qi+=N;sum[qi]=x;l[qi]=r[qi]=ans[qi]=max(x,0);
	for(qi>>=1;qi;qi>>=1) pull(qi);
}
/*void Set(int c, int ss, int se, int qi, int x)
{
	if(ss==se){ sum[c]=x;l[c]=r[c]=ans[c]=max(0,x);return;}
	int mid=ss+se>>1;
	if(qi<=mid) Set(c<<1,ss,mid,qi,x);
	else Set(c<<1|1,mid+1,se,qi,x);
	pull(c);
}*/
struct pt{ ll x,y;pt(){}pt(ll a, ll b):x(a),y(b){}};
bool operator < (pt a, pt b){ return mp(a.y,a.x)<mp(b.y,b.x);}
pt operator - (pt a, pt b){ return pt(a.x-b.x,a.y-b.y);}
ll cross(pt a, pt b){ return a.x*b.y-a.y*b.x;}
ll dot(pt a, pt b){ return a.x*b.x+a.y*b.y;}
ll sq(pt a){ return dot(a,a);}
int part(pt a){ return a<pt(0,0);}
#define ldb double
const ldb PI=acos(-1);
ldb angle(pt a)
{
	ldb ang=atan2(a.y,a.x);
	if(ang<0) ang+=2*PI;
	return ang;
}
bool comp(pt a, pt b){ return mt(part(a),(ll)0)<mt(part(b),cross(a,b));}
bool eq(pt a, pt b){ return comp(a,b)==comp(b,a);}
pt P[N];
int w[N],id[N],pos[N];
ll sol;
void SW(int x, int y)
{
	swap(pos[x],pos[y]);
	swap(A[pos[x]],A[pos[y]]);
	Set(pos[x],A[pos[x]]);
	Set(pos[y],A[pos[y]]);
	//sol=max(sol,ans[1]);
}
int main()
{
    int n;
    scanf("%i",&n);
    for(int i=1;i<=n;i++) scanf("%lld %lld %i",&P[i].x,&P[i].y,&w[i]),id[i]=i;
    sort(id+1,id+1+n,[&](int i, int j){ return P[i]<P[j];});
	for(int i=1;i<=n;i++) A[i]=w[id[i]],pos[id[i]]=i;
	Build();
	sol=ans[1];
	int sz=n*(n-1)/2;
	vector<pt> events;
	vector<int> id,X,Y;
	vector<ldb> ang;
	events.reserve(sz);
	X.reserve(sz);
	Y.reserve(sz);
	id.reserve(sz);
	ang.reserve(sz);
	for(int i=1;i<=n;i++) for(int j=i+1;j<=n;j++)
	{
		pt d=P[i]-P[j];
		if(part(d)==1) d=pt(0,0)-d;
		id.pb(events.size()),events.pb(d),ang.pb(angle(d));
		X.pb(i);Y.pb(j);
	}
	//sort(events.begin(),events.end(),[&](pair<pt,pair<int,int>> a, pair<pt,pair<int,int>> b){ return comp(a.first,b.first);});
	sort(id.begin(),id.end(),[&](int i, int j){ return comp(events[i],events[j]);});
	for(int i=0,j;i<id.size();i=j)
	{
		vector<int> v;//SW(events[id[j]].second.first,events[id[j]].second.second);
		for(j=i;j<id.size() && eq(events[id[i]],events[id[j]])/*ang[id[i]]==ang[id[j]]*/;j++) v.pb(X[id[j]]),v.pb(Y[id[j]]);
		sort(v.begin(),v.end(),[&](int a, int b){ return pos[a]<pos[b];});
		v.erase(unique(v.begin(),v.end()),v.end());
		for(int k=0,l;k<v.size();k=l)
		{
			for(l=k+1;l<v.size() && pos[v[l-1]]+1==pos[v[l]];l++);
			for(int z=k,t=l-1;z<t;z++,t--) SW(v[z],v[t]);
		}
		/*int x=events[i].second.first;
		int y=events[i].second.second;
		swap(pos[x],pos[y]);
		swap(A[pos[x]],A[pos[y]]);
		Set(pos[x],A[pos[x]]);
		Set(pos[y],A[pos[y]]);
		//printf("SWAP %i %i: %lld\n",x,y,ans[1]);
		sol=max(sol,ans[1]);
		//for(int z=N+1;z<=N+n;z++) printf("%lld ",sum[z]);
		//printf("\n");*/
		sol=max(sol,ans[1]);
	}
	printf("%lld\n",sol);
	return 0;
}

Compilation message

bulldozer.cpp: In function 'int main()':
bulldozer.cpp:97:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0,j;i<id.size();i=j)
                ~^~~~~~~~~~
bulldozer.cpp:100:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(j=i;j<id.size() && eq(events[id[i]],events[id[j]])/*ang[id[i]]==ang[id[j]]*/;j++) v.pb(X[id[j]]),v.pb(Y[id[j]]);
           ~^~~~~~~~~~
bulldozer.cpp:103:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int k=0,l;k<v.size();k=l)
                 ~^~~~~~~~~
bulldozer.cpp:105:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(l=k+1;l<v.size() && pos[v[l-1]]+1==pos[v[l]];l++);
              ~^~~~~~~~~
bulldozer.cpp:73:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%i",&n);
     ~~~~~^~~~~~~~~
bulldozer.cpp:74:70: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for(int i=1;i<=n;i++) scanf("%lld %lld %i",&P[i].x,&P[i].y,&w[i]),id[i]=i;
                           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 760 KB Output is correct
2 Correct 3 ms 760 KB Output is correct
3 Correct 3 ms 760 KB Output is correct
4 Correct 3 ms 760 KB Output is correct
5 Correct 3 ms 760 KB Output is correct
6 Correct 3 ms 760 KB Output is correct
7 Correct 3 ms 760 KB Output is correct
8 Correct 3 ms 760 KB Output is correct
9 Correct 3 ms 760 KB Output is correct
10 Correct 3 ms 760 KB Output is correct
11 Correct 2 ms 504 KB Output is correct
12 Correct 2 ms 504 KB Output is correct
13 Correct 2 ms 504 KB Output is correct
14 Correct 2 ms 632 KB Output is correct
15 Correct 2 ms 508 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 632 KB Output is correct
2 Correct 5 ms 632 KB Output is correct
3 Correct 5 ms 632 KB Output is correct
4 Correct 5 ms 632 KB Output is correct
5 Correct 5 ms 636 KB Output is correct
6 Correct 5 ms 632 KB Output is correct
7 Correct 4 ms 632 KB Output is correct
8 Correct 4 ms 632 KB Output is correct
9 Correct 5 ms 632 KB Output is correct
10 Correct 5 ms 632 KB Output is correct
11 Correct 2 ms 504 KB Output is correct
12 Correct 2 ms 504 KB Output is correct
13 Correct 3 ms 504 KB Output is correct
14 Correct 2 ms 504 KB Output is correct
15 Correct 2 ms 508 KB Output is correct
16 Correct 2 ms 504 KB Output is correct
17 Correct 3 ms 504 KB Output is correct
18 Correct 2 ms 504 KB Output is correct
19 Correct 2 ms 504 KB Output is correct
20 Correct 2 ms 504 KB Output is correct
21 Correct 5 ms 632 KB Output is correct
22 Correct 5 ms 632 KB Output is correct
23 Correct 5 ms 632 KB Output is correct
24 Correct 4 ms 632 KB Output is correct
25 Correct 5 ms 632 KB Output is correct
26 Correct 5 ms 632 KB Output is correct
27 Correct 5 ms 632 KB Output is correct
28 Correct 4 ms 632 KB Output is correct
29 Correct 4 ms 632 KB Output is correct
30 Correct 5 ms 632 KB Output is correct
31 Correct 5 ms 632 KB Output is correct
32 Correct 5 ms 760 KB Output is correct

Subtask #3
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 632 KB Output is correct
2 Correct 5 ms 632 KB Output is correct
3 Correct 5 ms 632 KB Output is correct
4 Correct 5 ms 632 KB Output is correct
5 Correct 5 ms 636 KB Output is correct
6 Correct 5 ms 632 KB Output is correct
7 Correct 4 ms 632 KB Output is correct
8 Correct 4 ms 632 KB Output is correct
9 Correct 5 ms 632 KB Output is correct
10 Correct 5 ms 632 KB Output is correct
11 Correct 2 ms 504 KB Output is correct
12 Correct 2 ms 504 KB Output is correct
13 Correct 3 ms 504 KB Output is correct
14 Correct 2 ms 504 KB Output is correct
15 Correct 2 ms 508 KB Output is correct
16 Correct 2 ms 504 KB Output is correct
17 Correct 3 ms 504 KB Output is correct
18 Correct 2 ms 504 KB Output is correct
19 Correct 2 ms 504 KB Output is correct
20 Correct 2 ms 504 KB Output is correct
21 Correct 5 ms 632 KB Output is correct
22 Correct 5 ms 632 KB Output is correct
23 Correct 5 ms 632 KB Output is correct
24 Correct 4 ms 632 KB Output is correct
25 Correct 5 ms 632 KB Output is correct
26 Correct 5 ms 632 KB Output is correct
27 Correct 5 ms 632 KB Output is correct
28 Correct 4 ms 632 KB Output is correct
29 Correct 4 ms 632 KB Output is correct
30 Correct 5 ms 632 KB Output is correct
31 Correct 5 ms 632 KB Output is correct
32 Correct 5 ms 760 KB Output is correct
33 Correct 1914 ms 70972 KB Output is correct
34 Correct 1994 ms 71032 KB Output is correct
35 Correct 1910 ms 71004 KB Output is correct
36 Correct 1936 ms 71032 KB Output is correct
37 Correct 1966 ms 70992 KB Output is correct
38 Correct 1946 ms 71024 KB Output is correct
39 Correct 1980 ms 71052 KB Output is correct
40 Execution timed out 2033 ms 71000 KB Time limit exceeded
41 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 632 KB Output is correct
2 Correct 5 ms 632 KB Output is correct
3 Correct 5 ms 632 KB Output is correct
4 Correct 5 ms 632 KB Output is correct
5 Correct 5 ms 636 KB Output is correct
6 Correct 5 ms 632 KB Output is correct
7 Correct 4 ms 632 KB Output is correct
8 Correct 4 ms 632 KB Output is correct
9 Correct 5 ms 632 KB Output is correct
10 Correct 5 ms 632 KB Output is correct
11 Correct 2 ms 504 KB Output is correct
12 Correct 2 ms 504 KB Output is correct
13 Correct 3 ms 504 KB Output is correct
14 Correct 2 ms 504 KB Output is correct
15 Correct 2 ms 508 KB Output is correct
16 Correct 2 ms 504 KB Output is correct
17 Correct 3 ms 504 KB Output is correct
18 Correct 2 ms 504 KB Output is correct
19 Correct 2 ms 504 KB Output is correct
20 Correct 2 ms 504 KB Output is correct
21 Correct 5 ms 632 KB Output is correct
22 Correct 5 ms 632 KB Output is correct
23 Correct 5 ms 632 KB Output is correct
24 Correct 4 ms 632 KB Output is correct
25 Correct 5 ms 632 KB Output is correct
26 Correct 5 ms 632 KB Output is correct
27 Correct 5 ms 632 KB Output is correct
28 Correct 4 ms 632 KB Output is correct
29 Correct 4 ms 632 KB Output is correct
30 Correct 5 ms 632 KB Output is correct
31 Correct 5 ms 632 KB Output is correct
32 Correct 5 ms 760 KB Output is correct
33 Correct 1914 ms 70972 KB Output is correct
34 Correct 1994 ms 71032 KB Output is correct
35 Correct 1910 ms 71004 KB Output is correct
36 Correct 1936 ms 71032 KB Output is correct
37 Correct 1966 ms 70992 KB Output is correct
38 Correct 1946 ms 71024 KB Output is correct
39 Correct 1980 ms 71052 KB Output is correct
40 Execution timed out 2033 ms 71000 KB Time limit exceeded
41 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 760 KB Output is correct
2 Correct 3 ms 760 KB Output is correct
3 Correct 3 ms 760 KB Output is correct
4 Correct 3 ms 760 KB Output is correct
5 Correct 3 ms 760 KB Output is correct
6 Correct 3 ms 760 KB Output is correct
7 Correct 3 ms 760 KB Output is correct
8 Correct 3 ms 760 KB Output is correct
9 Correct 3 ms 760 KB Output is correct
10 Correct 3 ms 760 KB Output is correct
11 Correct 2 ms 504 KB Output is correct
12 Correct 2 ms 504 KB Output is correct
13 Correct 2 ms 504 KB Output is correct
14 Correct 2 ms 632 KB Output is correct
15 Correct 2 ms 508 KB Output is correct
16 Correct 5 ms 632 KB Output is correct
17 Correct 5 ms 632 KB Output is correct
18 Correct 5 ms 632 KB Output is correct
19 Correct 5 ms 632 KB Output is correct
20 Correct 5 ms 636 KB Output is correct
21 Correct 5 ms 632 KB Output is correct
22 Correct 4 ms 632 KB Output is correct
23 Correct 4 ms 632 KB Output is correct
24 Correct 5 ms 632 KB Output is correct
25 Correct 5 ms 632 KB Output is correct
26 Correct 2 ms 504 KB Output is correct
27 Correct 2 ms 504 KB Output is correct
28 Correct 3 ms 504 KB Output is correct
29 Correct 2 ms 504 KB Output is correct
30 Correct 2 ms 508 KB Output is correct
31 Correct 2 ms 504 KB Output is correct
32 Correct 3 ms 504 KB Output is correct
33 Correct 2 ms 504 KB Output is correct
34 Correct 2 ms 504 KB Output is correct
35 Correct 2 ms 504 KB Output is correct
36 Correct 5 ms 632 KB Output is correct
37 Correct 5 ms 632 KB Output is correct
38 Correct 5 ms 632 KB Output is correct
39 Correct 4 ms 632 KB Output is correct
40 Correct 5 ms 632 KB Output is correct
41 Correct 5 ms 632 KB Output is correct
42 Correct 5 ms 632 KB Output is correct
43 Correct 4 ms 632 KB Output is correct
44 Correct 4 ms 632 KB Output is correct
45 Correct 5 ms 632 KB Output is correct
46 Correct 5 ms 632 KB Output is correct
47 Correct 5 ms 760 KB Output is correct
48 Correct 1914 ms 70972 KB Output is correct
49 Correct 1994 ms 71032 KB Output is correct
50 Correct 1910 ms 71004 KB Output is correct
51 Correct 1936 ms 71032 KB Output is correct
52 Correct 1966 ms 70992 KB Output is correct
53 Correct 1946 ms 71024 KB Output is correct
54 Correct 1980 ms 71052 KB Output is correct
55 Execution timed out 2033 ms 71000 KB Time limit exceeded
56 Halted 0 ms 0 KB -