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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
#662009#5426. Drain the Water TankSunwkingWA 0ms3860kbC++201.1kb2024-10-20 20:01:542024-10-20 20:02:06

Judging History

你现在查看的是最新测评结果

  • [2024-10-20 20:02:06]
  • 评测
  • 测评结果:WA
  • 用时:0ms
  • 内存:3860kb
  • [2024-10-20 20:01:54]
  • 提交

answer

//
// Created by Lenovo on 2024/10/20.
//
#include <bits/stdc++.h>

using namespace std;

typedef int db;

struct P{
    db x , y;
    P(){};
    P(db _x , db _y) : x(_x) , y(_y){}

    P operator- (P p) {return {x - p.x , y - p.y}; }
    db det(P p){return x * p.y - y * p.x;}

    int quad() const {return y > 0 || y == 0 && x >= 0;}
};

int main(){
    int n;
    cin >> n;

    vector<P> a(n);
    for(int i = 0 ; i < n ; i ++ )
        cin >> a[i].x >> a[i].y;

    vector<int> st(n);
    int ans = 0;
    for(int i = 0 ; i < n ; i ++ ){
        int l = (i - 1 + n) % n;
        int r = (i + 1) % n;
        if(a[l].y > a[i].y && a[r].y > a[i].y && (a[i] - a[l]).det(a[r] - a[i]) > 0)
            ans ++ , st[i] = 1;
    }

    for(int i = 0 ; i < n ; i ++ ){
        int j = i + 1;
        if(a[j].y != a[i].y) continue;
        while(j < 2 * n && a[j % n].y <= a[(j - 1) % n].y)
            j ++;
        j --;
        if(!st[j % n]){
            ans ++;
//            cout << j << "\n";
            st[j % n] = 1;
            i = j + 1;
        }
    }
    cout << ans << "\n";
}

详细

Test #1:

score: 100
Accepted
time: 0ms
memory: 3568kb

input:

6
0 0
1 1
2 1
3 0
3 2
0 2

output:

2

result:

ok 1 number(s): "2"

Test #2:

score: 0
Accepted
time: 0ms
memory: 3600kb

input:

8
4 4
0 4
0 2
1 2
2 2
2 0
3 0
4 0

output:

1

result:

ok 1 number(s): "1"

Test #3:

score: 0
Accepted
time: 0ms
memory: 3804kb

input:

7
1 0
3 4
0 3
1 2
2 3
1 1
0 2

output:

2

result:

ok 1 number(s): "2"

Test #4:

score: 0
Accepted
time: 0ms
memory: 3628kb

input:

6
0 0
2 0
1 1
4 1
5 0
3 4

output:

2

result:

ok 1 number(s): "2"

Test #5:

score: 0
Accepted
time: 0ms
memory: 3852kb

input:

8
0 0
1 0
3 -1
3 0
1 1
4 1
5 0
3 4

output:

2

result:

ok 1 number(s): "2"

Test #6:

score: 0
Accepted
time: 0ms
memory: 3860kb

input:

5
0 0
170 0
140 30
60 30
0 70

output:

1

result:

ok 1 number(s): "1"

Test #7:

score: 0
Accepted
time: 0ms
memory: 3512kb

input:

5
0 0
170 0
140 30
60 30
0 100

output:

1

result:

ok 1 number(s): "1"

Test #8:

score: 0
Accepted
time: 0ms
memory: 3568kb

input:

5
0 0
1 2
1 5
0 2
0 1

output:

1

result:

ok 1 number(s): "1"

Test #9:

score: 0
Accepted
time: 0ms
memory: 3624kb

input:

3
0 0
100 0
0 100

output:

1

result:

ok 1 number(s): "1"

Test #10:

score: 0
Accepted
time: 0ms
memory: 3556kb

input:

3
200 0
100 100
0 0

output:

1

result:

ok 1 number(s): "1"

Test #11:

score: 0
Accepted
time: 0ms
memory: 3624kb

input:

3
50 50
100 50
100 100

output:

1

result:

ok 1 number(s): "1"

Test #12:

score: 0
Accepted
time: 0ms
memory: 3856kb

input:

3
3 0
0 4
0 0

output:

1

result:

ok 1 number(s): "1"

Test #13:

score: 0
Accepted
time: 0ms
memory: 3820kb

input:

3
10000 10000
-10000 10000
10000 9999

output:

1

result:

ok 1 number(s): "1"

Test #14:

score: 0
Accepted
time: 0ms
memory: 3788kb

input:

3
10000 10000
-10000 10000
10000 9900

output:

1

result:

ok 1 number(s): "1"

Test #15:

score: 0
Accepted
time: 0ms
memory: 3560kb

input:

3
10000 10000
9999 10000
10000 -10000

output:

1

result:

ok 1 number(s): "1"

Test #16:

score: 0
Accepted
time: 0ms
memory: 3628kb

input:

3
0 0
200 0
100 173

output:

1

result:

ok 1 number(s): "1"

Test #17:

score: 0
Accepted
time: 0ms
memory: 3616kb

input:

3
0 0
200 0
100 1

output:

1

result:

ok 1 number(s): "1"

Test #18:

score: 0
Accepted
time: 0ms
memory: 3624kb

input:

3
-10000 -10000
10000 9999
9999 10000

output:

1

result:

ok 1 number(s): "1"

Test #19:

score: 0
Accepted
time: 0ms
memory: 3564kb

input:

4
10 10
20 10
20 20
10 20

output:

1

result:

ok 1 number(s): "1"

Test #20:

score: 0
Accepted
time: 0ms
memory: 3624kb

input:

4
-10000 -10000
10000 -10000
10000 10000
-10000 10000

output:

1

result:

ok 1 number(s): "1"

Test #21:

score: 0
Accepted
time: 0ms
memory: 3560kb

input:

4
100 0
200 100
100 200
0 100

output:

1

result:

ok 1 number(s): "1"

Test #22:

score: 0
Accepted
time: 0ms
memory: 3628kb

input:

4
0 1
100 0
101 100
1 101

output:

1

result:

ok 1 number(s): "1"

Test #23:

score: 0
Accepted
time: 0ms
memory: 3820kb

input:

4
0 0
100 0
100 50
0 50

output:

1

result:

ok 1 number(s): "1"

Test #24:

score: 0
Accepted
time: 0ms
memory: 3568kb

input:

4
0 0
50 0
50 100
0 100

output:

1

result:

ok 1 number(s): "1"

Test #25:

score: 0
Accepted
time: 0ms
memory: 3824kb

input:

4
0 10
10 0
100 90
90 100

output:

1

result:

ok 1 number(s): "1"

Test #26:

score: 0
Accepted
time: 0ms
memory: 3628kb

input:

8
0 100
100 0
250 0
350 100
350 250
250 350
100 350
0 250

output:

1

result:

ok 1 number(s): "1"

Test #27:

score: 0
Accepted
time: 0ms
memory: 3592kb

input:

6
0 50
10 0
70 0
80 10
70 50
50 80

output:

1

result:

ok 1 number(s): "1"

Test #28:

score: 0
Accepted
time: 0ms
memory: 3600kb

input:

4
0 100
0 0
100 0
20 20

output:

1

result:

ok 1 number(s): "1"

Test #29:

score: 0
Accepted
time: 0ms
memory: 3632kb

input:

4
0 100
55 55
100 0
100 100

output:

1

result:

ok 1 number(s): "1"

Test #30:

score: -100
Wrong Answer
time: 0ms
memory: 3568kb

input:

8
0 0
100 0
100 20
40 20
40 40
100 40
100 60
0 60

output:

2

result:

wrong answer 1st numbers differ - expected: '1', found: '2'