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ID题目提交者结果用时内存语言文件大小提交时间测评时间
#624640#9427. Collect the CoinsIdtwtei#WA 15ms5928kbC++14875b2024-10-09 16:18:002024-10-09 16:18:04

Judging History

你现在查看的是最新测评结果

  • [2024-11-06 15:56:27]
  • hack成功,自动添加数据
  • (/hack/1139)
  • [2024-10-09 16:18:04]
  • 评测
  • 测评结果:WA
  • 用时:15ms
  • 内存:5928kb
  • [2024-10-09 16:18:00]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;

#define int long long
const int N=1e6+100,INF=1e9;
#define gc getchar()
#define rd read()
inline int read(){
	int x=0,f=0; char c=gc;
	for(;c<'0'||c>'9';c=gc) f|=(c=='-');
	for(;c>='0'&&c<='9';c=gc) x=(x<<1)+(x<<3)+(c^48);
	return f?-x:x;
}

int n,t[N],x[N];

int chk(int v){
	int p=x[1],l=-INF,r=INF;
	for(int i=2,dt,l0,r0;i<=n;++i){
		dt=(t[i]-t[i-1])*v,l0=INF,r0=-INF;
		if(p-dt<=x[i]&&x[i]<=p+dt) l0=min(l0,l-dt),r0=max(r0,r+dt);
		if(l-dt<=x[i]&&x[i]<=r+dt) l0=min(l0,p-dt),r0=max(r0,p+dt);
		p=x[i],l=l0,r=r0;
	}
	return l<=r;
}

void solve(){
	n=rd; for(int i=1;i<=n;++i) t[i]=rd,x[i]=rd;
	
	int l=0,r=INF;
	while(l<r){
		int mid=l+r>>1;
		if(chk(mid)) r=mid;
		else l=mid+1;
	}
	printf("%lld\n", l==INF?-1:l);
}

signed main(){
	
	int T=rd;
	while(T--) solve();
	
	return 0;
}

詳細信息

Test #1:

score: 100
Accepted
time: 1ms
memory: 5812kb

input:

3
5
1 1
3 7
3 4
4 3
5 10
1
10 100
3
10 100
10 1000
10 10000

output:

2
0
-1

result:

ok 3 lines

Test #2:

score: -100
Wrong Answer
time: 15ms
memory: 5928kb

input:

1135
2
6 5
8 8
8
2 9
2 10
4 4
5 3
6 2
6 8
8 2
8 7
1
9 1
6
4 6
6 1
6 2
9 10
10 1
10 7
5
1 6
2 5
6 7
8 6
10 3
8
1 10
5 4
5 7
6 1
6 6
8 4
9 1
9 4
8
1 1
1 3
2 9
3 3
5 9
6 10
9 7
10 7
3
5 8
6 6
10 6
7
2 9
4 7
5 10
6 3
6 7
8 9
10 1
6
1 4
2 8
5 9
7 10
9 1
10 5
9
2 7
4 5
5 9
6 10
7 4
9 4
9 9
10 3
10 7
1
3 1...

output:

0
3
0
3
1
3
6
0
3
2
2
0
2
5
0
1
5
1
2
0
0
0
1
4
2
0
2
1
3
0
3
2
3
2
5
3
1
1
0
1
1
1
0
2
0
1
0
1
0
2
1
0
2
3
4
4
1
1
1
0
1
3
0
1
4
4
3
0
0
2
2
6
4
2
1
0
0
1
0
2
1
2
0
1
1
3
0
0
1
2
0
3
0
2
2
2
1
0
0
0
5
1
2
0
6
1
1
1
2
2
2
0
3
1
4
3
6
0
8
1
1
3
0
2
2
4
1
1
0
0
0
7
2
2
1
0
0
3
1
2
1
1
2
5
3
0
3
3
3
5
...

result:

wrong answer 401st lines differ - expected: '10', found: '3'