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Submission #43633

# Submission time Handle Problem Language Result Execution time Memory
43633 2018-03-18T18:02:32 Z duiceman Palembang Bridges (APIO15_bridge) C++14
100 / 100
 1613 ms 72932 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 x first
#define y second
#define umap unordered_map
#define pqueue priority_queue
#define mset multiset
#define mp make_pair
#define mt make_tuple
#define all(x) x.begin(),x.end()
#define long long long
#define MOD 1000000007
#define MAX (long)(1e16+5)
#define MIN (long)(-1e16-5)
#define FILEIN_ freopen("__in.txt","r",stdin)
#define FILEOUT_ freopen("__out.txt","w",stdout)
#define FILEIO_ freopen("__in.txt","r",stdin),freopen("__out.txt","w",stdout)
#define FILEIN(text) freopen(text,"r",stdin)
#define FILEOUT(text) freopen(text,"w",stdout)
#define FILEIO(text) freopen(text".in","r",stdin),freopen(text".out","w",stdout)
 
template<typename T>using oset=tree<T,null_type,less_equal<T>,rb_tree_tag,tree_order_statistics_node_update>;
char c1[5],c2[5];
pair<long,long> a[100005];
vector<long> pos(1,0);
long sml[600005],smll[600005],smls[600005],smr[600005],smrl[600005],smrs[600005],best[100005];
umap<long,long> wh;
void sm_upl(long tidx,long l,long r,long x,long y,long w,long s){
	long mid = (l+r)/2;
	if(x > r || y < l){
		return;
	}
	if(x <= l && y >= r){
		smll[tidx] += w;
		smls[tidx] += (pos[y]-pos[r])*2*w + s;
		sml[tidx] += (pos[y]-pos[r])*2*w + s + ((pos[r]-pos[l])*(pos[r]-pos[l]+1))*w;
		return;
	}
	if(smll[tidx] || smls[tidx]){
		sm_upl(tidx*2,l,mid,l,r,smll[tidx],smls[tidx]);
		sm_upl(tidx*2+1,mid+1,r,l,r,smll[tidx],smls[tidx]);
		smll[tidx] = smls[tidx] = 0;
	}
	sm_upl(tidx*2,l,mid,x,y,w,s);
	sm_upl(tidx*2+1,mid+1,r,x,y,w,s);
	sml[tidx] = sml[tidx*2] + sml[tidx*2+1];
}
void sm_upr(long tidx,long l,long r,long x,long y,long w,long s){
	long mid = (l+r)/2;
	if(x > r || y < l){
		return;
	}
	if(x <= l && y >= r){
		smrl[tidx] += w;
		smrs[tidx] += (pos[l]-pos[x])*2*w + s;
		smr[tidx] += (pos[l]-pos[x])*2*w + s + ((pos[r]-pos[l])*(pos[r]-pos[l]+1))*w;
		return;
	}
	if(smrl[tidx] || smrs[tidx]){
		sm_upr(tidx*2,l,mid,l,r,smrl[tidx],smrs[tidx]);
		sm_upr(tidx*2+1,mid+1,r,l,r,smrl[tidx],smrs[tidx]);
		smrl[tidx] = smrs[tidx] = 0;
	}
	sm_upr(tidx*2,l,mid,x,y,w,s);
	sm_upr(tidx*2+1,mid+1,r,x,y,w,s);
	smr[tidx] = smr[tidx*2] + smr[tidx*2+1];
}
long sm_get(long tidx,long l,long r,long x){
	long mid = (l+r)/2;
	if(x > r || x < l){
		return 0;
	}
	if(x <= l && x >= r){
		return sml[tidx] + smr[tidx];
	}
	if(smll[tidx] || smls[tidx]){
		sm_upl(tidx*2,l,mid,l,r,smll[tidx],smls[tidx]);
		sm_upl(tidx*2+1,mid+1,r,l,r,smll[tidx],smls[tidx]);
		smll[tidx] = smls[tidx] = 0;
	}
	if(smrl[tidx] || smrs[tidx]){
		sm_upr(tidx*2,l,mid,l,r,smrl[tidx],smrs[tidx]);
		sm_upr(tidx*2+1,mid+1,r,l,r,smrl[tidx],smrs[tidx]);
		smrl[tidx] = smrs[tidx] = 0;
	}
	return sm_get(tidx*2,l,mid,x) + sm_get(tidx*2+1,mid+1,r,x);
}
bool rs(pair<int,int> x,pair<int,int> y){
	return ((double)(x.x+x.y))/2 < ((double)(y.x+y.y))/2;
}
 
main(){
	long t,i,j,k,n,m,x,y,res=0,mn=MAX,v;
	oset<int> apos;
	
	scanf("%lld %lld",&k,&n);
	for(i = 1; i <= n; i++){
		scanf("%s %lld %s %lld",c1,&x,c2,&y);
		x++;
		y++;
		if(x > y) swap(x,y);
		res += abs(y-x);
		if(c1[0] == c2[0]){
			n--;
			i--;
			continue;
		}
		a[i] = {x,y};
		res++;
		pos.emplace_back(x);
		pos.emplace_back(y);
	}
	if(!n){
		printf("%d\n",res);
		return 0;
	}
	sort(all(pos));
	pos.resize(unique(all(pos))-pos.begin());
	m = pos.size()-1;
	sort(a+1,a+1+n,rs);
	for(i = 0; i < pos.size(); i++){
		wh[pos[i]] = i;
	}
	for(i = 1; i <= n; i++){
		x = a[i].x;
		y = a[i].y;
		apos.insert(x);
		apos.insert(y);
		sm_upl(1,1,m,1,wh[x],1,0);
		sm_upr(1,1,m,wh[y],m,1,0);
		best[i] = sm_get(1,1,m,wh[*apos.find_by_order(apos.size()/2)]);
		if(apos.size()/2+1 < apos.size()) best[i] = min(best[i],sm_get(1,1,m,wh[*apos.find_by_order(apos.size()/2+1)]));
		if(apos.size()/2-1 > 0) best[i] = min(best[i],sm_get(1,1,m,wh[*apos.find_by_order(apos.size()/2-1)]));
	}
	if(k == 1){
		printf("%lld\n",res+best[n]);
		return 0;
	}
	memset(sml,0,sizeof sml);
	memset(smll,0,sizeof smll);
	memset(smls,0,sizeof smls);
	memset(smr,0,sizeof smr);
	memset(smrl,0,sizeof smrl);
	memset(smrs,0,sizeof smrs);
	apos.clear();
	mn = best[n];
	for(i = n; i >= 1; i--){
		x = a[i].x;
		y = a[i].y;
		apos.insert(x);
		apos.insert(y);
		sm_upl(1,1,m,1,wh[x],1,0);
		sm_upr(1,1,m,wh[y],m,1,0);
		mn = min(mn,sm_get(1,1,m,wh[*apos.find_by_order(apos.size()/2)]) + best[i-1]);
		if(apos.size()/2+1 < apos.size()) mn = min(mn,sm_get(1,1,m,wh[*apos.find_by_order(apos.size()/2+1)]) + best[i-1]);
		if(apos.size()/2-1 > 0) mn = min(mn,sm_get(1,1,m,wh[*apos.find_by_order(apos.size()/2-1)]) + best[i-1]);
	}
	printf("%lld\n",mn+res);
 
	return 0;	
}

Compilation message

bridge.cpp:97:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main(){
      ^
bridge.cpp: In function 'int main()':
bridge.cpp:119:20: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
   printf("%d\n",res);
                    ^
bridge.cpp:126:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(i = 0; i < pos.size(); i++){
               ^
bridge.cpp:98:7: warning: unused variable 't' [-Wunused-variable]
  long t,i,j,k,n,m,x,y,res=0,mn=MAX,v;
       ^
bridge.cpp:98:11: warning: unused variable 'j' [-Wunused-variable]
  long t,i,j,k,n,m,x,y,res=0,mn=MAX,v;
           ^
bridge.cpp:98:36: warning: unused variable 'v' [-Wunused-variable]
  long t,i,j,k,n,m,x,y,res=0,mn=MAX,v;
                                    ^
bridge.cpp:101:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lld %lld",&k,&n);
                          ^
bridge.cpp:103:39: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%s %lld %s %lld",c1,&x,c2,&y);
                                       ^

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 252 KB Output is correct
2 Correct 1 ms 352 KB Output is correct
3 Correct 3 ms 552 KB Output is correct
4 Correct 7 ms 952 KB Output is correct
5 Correct 5 ms 952 KB Output is correct
6 Correct 3 ms 952 KB Output is correct
7 Correct 5 ms 1076 KB Output is correct
8 Correct 4 ms 1076 KB Output is correct
9 Correct 4 ms 1076 KB Output is correct
10 Correct 3 ms 1076 KB Output is correct
11 Correct 5 ms 1076 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1076 KB Output is correct
2 Correct 2 ms 1076 KB Output is correct
3 Correct 3 ms 1076 KB Output is correct
4 Correct 5 ms 1076 KB Output is correct
5 Correct 6 ms 1076 KB Output is correct
6 Correct 3 ms 1076 KB Output is correct
7 Correct 4 ms 1076 KB Output is correct
8 Correct 4 ms 1076 KB Output is correct
9 Correct 4 ms 1076 KB Output is correct
10 Correct 3 ms 1076 KB Output is correct
11 Correct 6 ms 1076 KB Output is correct
12 Correct 240 ms 14224 KB Output is correct
13 Correct 917 ms 46804 KB Output is correct
14 Correct 446 ms 46804 KB Output is correct
15 Correct 486 ms 46804 KB Output is correct
16 Correct 234 ms 46804 KB Output is correct
17 Correct 619 ms 46932 KB Output is correct
18 Correct 323 ms 46932 KB Output is correct
19 Correct 601 ms 46932 KB Output is correct
20 Correct 250 ms 46932 KB Output is correct
21 Correct 505 ms 47064 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 47064 KB Output is correct
2 Correct 1 ms 47064 KB Output is correct
3 Correct 22 ms 47064 KB Output is correct
4 Correct 22 ms 47064 KB Output is correct
5 Correct 23 ms 47064 KB Output is correct
6 Correct 23 ms 47064 KB Output is correct
7 Correct 23 ms 47064 KB Output is correct
8 Correct 24 ms 47064 KB Output is correct
9 Correct 23 ms 47064 KB Output is correct
10 Correct 26 ms 47064 KB Output is correct
11 Correct 24 ms 47064 KB Output is correct
12 Correct 27 ms 47064 KB Output is correct

Subtask #4
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 47064 KB Output is correct
2 Correct 1 ms 47064 KB Output is correct
3 Correct 25 ms 47064 KB Output is correct
4 Correct 22 ms 47064 KB Output is correct
5 Correct 22 ms 47064 KB Output is correct
6 Correct 23 ms 47064 KB Output is correct
7 Correct 23 ms 47064 KB Output is correct
8 Correct 24 ms 47064 KB Output is correct
9 Correct 23 ms 47064 KB Output is correct
10 Correct 23 ms 47064 KB Output is correct
11 Correct 23 ms 47064 KB Output is correct
12 Correct 22 ms 47064 KB Output is correct
13 Correct 27 ms 47064 KB Output is correct
14 Correct 25 ms 47064 KB Output is correct
15 Correct 29 ms 47064 KB Output is correct
16 Correct 24 ms 47064 KB Output is correct
17 Correct 25 ms 47064 KB Output is correct
18 Correct 24 ms 47064 KB Output is correct
19 Correct 25 ms 47064 KB Output is correct
20 Correct 27 ms 47064 KB Output is correct
21 Correct 28 ms 47064 KB Output is correct
22 Correct 28 ms 47064 KB Output is correct
23 Correct 25 ms 47064 KB Output is correct
24 Correct 28 ms 47064 KB Output is correct

Subtask #5
37.0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 47064 KB Output is correct
2 Correct 2 ms 47064 KB Output is correct
3 Correct 22 ms 47064 KB Output is correct
4 Correct 25 ms 47064 KB Output is correct
5 Correct 23 ms 47064 KB Output is correct
6 Correct 24 ms 47064 KB Output is correct
7 Correct 22 ms 47064 KB Output is correct
8 Correct 23 ms 47064 KB Output is correct
9 Correct 23 ms 47064 KB Output is correct
10 Correct 24 ms 47064 KB Output is correct
11 Correct 23 ms 47064 KB Output is correct
12 Correct 29 ms 47064 KB Output is correct
13 Correct 24 ms 47064 KB Output is correct
14 Correct 27 ms 47064 KB Output is correct
15 Correct 29 ms 47064 KB Output is correct
16 Correct 23 ms 47064 KB Output is correct
17 Correct 25 ms 47064 KB Output is correct
18 Correct 25 ms 47064 KB Output is correct
19 Correct 25 ms 47064 KB Output is correct
20 Correct 27 ms 47064 KB Output is correct
21 Correct 26 ms 47064 KB Output is correct
22 Correct 28 ms 47064 KB Output is correct
23 Correct 23 ms 47064 KB Output is correct
24 Correct 27 ms 47064 KB Output is correct
25 Correct 407 ms 47064 KB Output is correct
26 Correct 551 ms 47064 KB Output is correct
27 Correct 1541 ms 54072 KB Output is correct
28 Correct 1590 ms 57024 KB Output is correct
29 Correct 1613 ms 59152 KB Output is correct
30 Correct 726 ms 59152 KB Output is correct
31 Correct 418 ms 59152 KB Output is correct
32 Correct 1039 ms 64428 KB Output is correct
33 Correct 614 ms 66504 KB Output is correct
34 Correct 1010 ms 68420 KB Output is correct
35 Correct 416 ms 68420 KB Output is correct
36 Correct 882 ms 72932 KB Output is correct
37 Correct 439 ms 72932 KB Output is correct