Submission #43570

#	Time	Username	Problem	Language	Result	Execution time	Memory
43570		duiceman	Palembang Bridges (APIO15_bridge)	C++14	0 / 100	4 ms	3860 KiB

bridge

#include <bits/stdc++.h>
 
using namespace std;
 
#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)
 
char c1[5],c2[5];
umap<long,long> in,out,bef;
pair<long,long> a[100005];
 
main(){
	long t,i,j,k,n,m,x,y,res=0,l=0,r=0,mn=MAX,mid,idx,v,lst,sz;
	mset<long> pos;
	//mset<long> apos;
	in.reserve(200005);
	out.reserve(200005);
	
	scanf("%lld %lld",&m,&n);
	if(m != 1) return 136;
	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++;
	}
	sort(a+1,a+1+n);
	l = r = 0;
	y = 0;
	pos.emplace(0);
	sz = 1;
	auto it = pos.begin();
	idx = v = 0;
	for(i = 1; i <= n; i++){
		x = a[i].x;
		y = a[i].y;
		in[x]++;
		out[y]++;
		sz += 2;
		pos.emplace(x);
		pos.emplace(y);
		if(x > v){
			r++;
			res += (x-v)*2;
		}
		else if(y <= v){
//			printf(">>>>>> %d %d\n",y,v);
			l++;
			idx += 2;
			res += (v-y)*2;
		}
		else if(x < v){
			idx++;
		}
		mid = (sz-1)/2+1;
		while(idx < mid){
			idx++;
			it++;
			lst = v;
			v = *it;
			if(v == lst) continue;
			res -= (v-lst)*r*2;
			res += (v-lst)*l*2;
			r -= in[v];
			l += out[v];
		}
	}
	printf("%lld\n",res);
 
	return 0;	
}

Compilation message (stderr)

bridge.cpp:28:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main(){
      ^
bridge.cpp: In function 'int main()':
bridge.cpp:29:7: warning: unused variable 't' [-Wunused-variable]
  long t,i,j,k,n,m,x,y,res=0,l=0,r=0,mn=MAX,mid,idx,v,lst,sz;
       ^
bridge.cpp:29:11: warning: unused variable 'j' [-Wunused-variable]
  long t,i,j,k,n,m,x,y,res=0,l=0,r=0,mn=MAX,mid,idx,v,lst,sz;
           ^
bridge.cpp:29:13: warning: unused variable 'k' [-Wunused-variable]
  long t,i,j,k,n,m,x,y,res=0,l=0,r=0,mn=MAX,mid,idx,v,lst,sz;
             ^
bridge.cpp:29:37: warning: unused variable 'mn' [-Wunused-variable]
  long t,i,j,k,n,m,x,y,res=0,l=0,r=0,mn=MAX,mid,idx,v,lst,sz;
                                     ^
bridge.cpp:35:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lld %lld",&m,&n);
                          ^
bridge.cpp:38:39: 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: 0 / 8
• Subtask 2: 0 / 14
• Subtask 3: 0 / 9
• Subtask 4: 0 / 32
• Subtask 5: 0 / 37