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Submission #25160

# Submission time Handle Problem Language Result Execution time Memory
25160 2017-06-20T10:37:33 Z suhgyuho_william Palembang Bridges (APIO15_bridge) C++14
63 / 100
 983 ms 12728 KB 
#include <bits/stdc++.h>

#define lld long long
#define pp pair<int,int>
#define pb push_back
#define MOD 10007
#define left lleft
#define right rright
#define INF 2000000000
#define LINF 1000000000000000000LL
#define next nnext

using namespace std;

int N,K,rear,nn;
int tx,ty,tx2,ty2,btx2,bty2,t1,t2;
lld memo,ans,sum,bsum;
lld cnt1,cnt2,cnt3,cnt4;
vector<lld> X;
struct IN{
	int x,y;
}in[100002];
struct data{
	int x,num;
}a[100002],b[100002];
vector<int> Value;
struct SEG{
	lld sum,cnt;
}seg[300002];

void process1(){
	for(int i=1; i<=N; i++){
		sum += (a[i].x+b[i].x-X[0]-X[0]);
		if(a[i].x > X[0]) cnt2++;
	}
	ans = min(ans,sum);
	while(1){
		if(tx == N || a[tx+1].x > X[0]) break;
		tx++;
	}
	for(int i=1; i<X.size(); i++){
		sum += (2*cnt1*(X[i]-X[i-1])); sum -= (2*cnt2*(X[i]-X[i-1]));
		while(1){
			if(tx == N || a[tx+1].x > X[i]) break;
			tx++;
			cnt2--;
		}
		while(1){
			if(ty == N || b[ty+1].x > X[i-1]) break;
			ty++;
			cnt1++; sum += (X[i]-X[i-1])*2;
		}
		ans = min(ans,sum);
	}
}
int change(int x){
	return lower_bound(Value.begin(),Value.end(),x)-Value.begin()+1;
}
SEG getseg(int node,int l,int r,int s,int e){
	if(r < s || e < l || s > e) return {0,0};
	if(s <= l && r <= e) return seg[node];
	int mid = (l+r)/2;
	SEG tmp1,tmp2;
	tmp1 = getseg(node*2,l,mid,s,e);
	tmp2 = getseg(node*2+1,mid+1,r,s,e);
	tmp1.sum += tmp2.sum; tmp1.cnt += tmp2.cnt;
	return tmp1;
}
SEG get2(lld s,lld e){
	int it1,it2;
	it1 = change(s); it2 = change(e+1);
	if(it2 == 1) return {0,0};
	it2--;
	return getseg(1,1,nn,it1,it2);
}
lld get(){
	int mid = X[t1]+X[t2];
	SEG tmp1,tmp2;
	tmp1 = get2((X[t1]+1)*2,mid);
	tmp2 = get2(mid+1,((X[t2]-1)*2));
	lld tsum = 0;
	tsum += (tmp1.sum-tmp1.cnt*2*X[t1]);
	tsum += (tmp2.cnt*2*X[t2]-tmp2.sum);
	return tsum;
}
void update(int x,int add){
	int value = Value[x-1];
	x += (nn-1);
	while(x){
		seg[x].sum += value*add;
		seg[x].cnt += add;
		x /= 2;
	}
}
void addt2(){
	t2++;
    sum -= (2*cnt2*(X[t2]-X[t2-1]));
	btx2 = tx2; bty2 = ty2;
	while(1){
		if(tx2 == N || a[tx2+1].x > X[t2]) break;
		tx2++;
		cnt2--;
	}
	while(1){
		if(ty2 == N || b[ty2+1].x > X[t2-1]) break;
		ty2++;
		if(in[b[ty2].num].x <= X[t1]) continue;
		//segupdate
		update(change(in[b[ty2].num].x+in[b[ty2].num].y),1);
		int x,y;
		x = in[b[ty2].num].x; y = in[b[ty2].num].y;
		sum -= (y-x);
	}
}
void undo(){
	for(int i=bty2+1; i<=ty2; i++){
		if(in[b[i].num].x <= X[t1]) continue;
		//segupdate
		update(change(in[b[i].num].x+in[b[i].num].y),-1);
		int x,y;
		x = in[b[i].num].x; y = in[b[i].num].y;
		sum += (y-x);
	}
	cnt2 += (tx2-btx2);
	tx2 = btx2; ty2 = bty2;
	sum += (2*cnt2*(X[t2]-X[t2-1]));
	t2--;
}

void process2(){
	for(int i=1; i<=N; i++){
		sum += (a[i].x+b[i].x-X[0]-X[0]);
		if(a[i].x > X[0]) cnt2++;
	}
	if(X.size() <= 1){
		ans = sum;
		return;
	}
	while(1){
		if(tx == N || a[tx+1].x > X[0]) break;
		tx++; tx2++;
	}
	while(1){
		if(t2 == X.size()-1) break;
		bsum = sum+get();
		addt2();
		if(sum+get() > bsum){
			undo();
			break;
		}
	}
	ans = min(ans,sum+get());
	while(t1+1 < X.size()-1){
		if(t2 == t1+1) addt2();
		//t1++
		t1++;
		sum += (2*cnt1*(X[t1]-X[t1-1]));
		while(1){
			if(tx == N || a[tx+1].x > X[t1]) break;
			tx++;
			if(in[a[tx].num].y >= X[t2]) continue;
			else{
				//seg update
				update(change(in[a[tx].num].x+in[a[tx].num].y),-1);
				int x,y;
                x = in[a[tx].num].x; y = in[a[tx].num].y;
                sum += (y-x);
			}
		}
		while(1){
			if(ty == N || b[ty+1].x > X[t1-1]) break;
			ty++;
			cnt1++;
			sum += (2*(X[t1]-X[t1-1]));
		}

		while(1){
			if(t2 == X.size()-1) break;
			bsum = sum+get();
			addt2();
			if(sum+get() > bsum){
				undo();
				break;
			}
		}
		ans = min(ans,sum+get());
	}
}

int main(){
    //freopen("input.txt","r",stdin);
	scanf("%d %d",&K,&N);
	for(int i=1; i<=N; i++){
		int x,y;
		char op1,op2;
		scanf("\n%c %d %c %d",&op1,&x,&op2,&y);
		if(x > y) swap(x,y);
		if(op1 == op2) memo += (y-x);
		else{
			rear++;
			a[rear].x = x; a[rear].num = rear;
			b[rear].x = y; b[rear].num = rear;
			X.pb(x); X.pb(y);
			memo++;
			in[rear].x = x; in[rear].y = y;
			Value.pb(x+y);
		}
	}
	N = rear; ans = LINF;
	sort(X.begin(),X.end());
	X.erase(unique(X.begin(),X.end()),X.end());
	sort(Value.begin(),Value.end());
	Value.erase(unique(Value.begin(),Value.end()),Value.end());
	for(nn=1; nn<Value.size(); nn*=2);
	sort(a+1,a+N+1,[&](data &x,data &y){
		return x.x < y.x;
	});
	sort(b+1,b+N+1,[&](data &x,data &y){
		return x.x < y.x;
	});
	if(K == 1) process1();
	else process2();
	ans += memo;
	printf("%lld\n",ans);

	return 0;
}

Compilation message

bridge.cpp: In function 'void process1()':
bridge.cpp:41:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=1; i<X.size(); i++){
                ^
bridge.cpp: In function 'void process2()':
bridge.cpp:144:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(t2 == X.size()-1) break;
         ^
bridge.cpp:153:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  while(t1+1 < X.size()-1){
             ^
bridge.cpp:178:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    if(t2 == X.size()-1) break;
          ^
bridge.cpp: In function 'int main()':
bridge.cpp:214:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(nn=1; nn<Value.size(); nn*=2);
              ^
bridge.cpp:192:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d",&K,&N);
                      ^
bridge.cpp:196:41: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("\n%c %d %c %d",&op1,&x,&op2,&y);
                                         ^

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 9060 KB Output is correct
2 Correct 0 ms 9060 KB Output is correct
3 Correct 0 ms 9060 KB Output is correct
4 Correct 0 ms 9060 KB Output is correct
5 Correct 0 ms 9060 KB Output is correct
6 Correct 0 ms 9060 KB Output is correct
7 Correct 0 ms 9060 KB Output is correct
8 Correct 0 ms 9060 KB Output is correct
9 Correct 0 ms 9060 KB Output is correct
10 Correct 0 ms 9060 KB Output is correct
11 Correct 0 ms 9060 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 9060 KB Output is correct
2 Correct 0 ms 9060 KB Output is correct
3 Correct 0 ms 9060 KB Output is correct
4 Correct 0 ms 9060 KB Output is correct
5 Correct 0 ms 9060 KB Output is correct
6 Correct 0 ms 9060 KB Output is correct
7 Correct 0 ms 9060 KB Output is correct
8 Correct 0 ms 9060 KB Output is correct
9 Correct 0 ms 9060 KB Output is correct
10 Correct 0 ms 9060 KB Output is correct
11 Correct 0 ms 9060 KB Output is correct
12 Correct 56 ms 12728 KB Output is correct
13 Correct 103 ms 12728 KB Output is correct
14 Correct 66 ms 12728 KB Output is correct
15 Correct 53 ms 10936 KB Output is correct
16 Correct 43 ms 12728 KB Output is correct
17 Correct 53 ms 12728 KB Output is correct
18 Correct 56 ms 12728 KB Output is correct
19 Correct 109 ms 12728 KB Output is correct
20 Correct 46 ms 12728 KB Output is correct
21 Correct 103 ms 12728 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 9060 KB Output is correct
2 Correct 0 ms 9060 KB Output is correct
3 Correct 0 ms 9060 KB Output is correct
4 Correct 0 ms 9060 KB Output is correct
5 Correct 0 ms 9060 KB Output is correct
6 Correct 0 ms 9060 KB Output is correct
7 Correct 0 ms 9060 KB Output is correct
8 Correct 0 ms 9060 KB Output is correct
9 Correct 0 ms 9060 KB Output is correct
10 Correct 0 ms 9060 KB Output is correct
11 Correct 0 ms 9060 KB Output is correct
12 Correct 0 ms 9060 KB Output is correct

Subtask #4
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 9060 KB Output is correct
2 Correct 0 ms 9060 KB Output is correct
3 Correct 0 ms 9060 KB Output is correct
4 Correct 0 ms 9060 KB Output is correct
5 Correct 0 ms 9060 KB Output is correct
6 Correct 0 ms 9060 KB Output is correct
7 Correct 0 ms 9060 KB Output is correct
8 Correct 0 ms 9060 KB Output is correct
9 Correct 0 ms 9060 KB Output is correct
10 Correct 0 ms 9060 KB Output is correct
11 Correct 0 ms 9060 KB Output is correct
12 Correct 0 ms 9060 KB Output is correct
13 Correct 0 ms 9060 KB Output is correct
14 Correct 0 ms 9060 KB Output is correct
15 Correct 3 ms 9060 KB Output is correct
16 Correct 0 ms 9060 KB Output is correct
17 Correct 0 ms 9060 KB Output is correct
18 Correct 0 ms 9060 KB Output is correct
19 Correct 0 ms 9060 KB Output is correct
20 Correct 3 ms 9060 KB Output is correct
21 Correct 0 ms 9060 KB Output is correct
22 Correct 3 ms 9060 KB Output is correct
23 Correct 0 ms 9060 KB Output is correct
24 Correct 3 ms 9060 KB Output is correct

Subtask #5
0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 9060 KB Output is correct
2 Correct 0 ms 9060 KB Output is correct
3 Correct 0 ms 9060 KB Output is correct
4 Correct 0 ms 9060 KB Output is correct
5 Correct 0 ms 9060 KB Output is correct
6 Correct 0 ms 9060 KB Output is correct
7 Correct 0 ms 9060 KB Output is correct
8 Correct 0 ms 9060 KB Output is correct
9 Correct 0 ms 9060 KB Output is correct
10 Correct 0 ms 9060 KB Output is correct
11 Correct 0 ms 9060 KB Output is correct
12 Correct 0 ms 9060 KB Output is correct
13 Correct 0 ms 9060 KB Output is correct
14 Correct 0 ms 9060 KB Output is correct
15 Correct 3 ms 9060 KB Output is correct
16 Correct 0 ms 9060 KB Output is correct
17 Correct 0 ms 9060 KB Output is correct
18 Correct 0 ms 9060 KB Output is correct
19 Correct 0 ms 9060 KB Output is correct
20 Correct 6 ms 9060 KB Output is correct
21 Correct 0 ms 9060 KB Output is correct
22 Correct 3 ms 9060 KB Output is correct
23 Correct 0 ms 9060 KB Output is correct
24 Correct 3 ms 9060 KB Output is correct
25 Correct 46 ms 12728 KB Output is correct
26 Correct 79 ms 12728 KB Output is correct
27 Correct 859 ms 12728 KB Output is correct
28 Correct 933 ms 12728 KB Output is correct
29 Correct 983 ms 12728 KB Output is correct
30 Correct 509 ms 10936 KB Output is correct
31 Correct 69 ms 12728 KB Output is correct
32 Correct 853 ms 12728 KB Output is correct
33 Correct 86 ms 12728 KB Output is correct
34 Correct 839 ms 12728 KB Output is correct
35 Correct 56 ms 12728 KB Output is correct
36 Correct 979 ms 12728 KB Output is correct
37 Incorrect 43 ms 12728 KB Output isn't correct