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QOJ
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 |
---|---|---|---|---|---|---|---|---|---|
#668687 | #5426. Drain the Water Tank | lmx111 | WA | 0ms | 3692kb | C++20 | 2.1kb | 2024-10-23 15:28:51 | 2024-10-23 15:28:56 |
Judging History
answer
// Coded by hjxddl
#include <bits/stdc++.h>
#define ll long long
#define db double
const int N = 2e5 + 5;
int n;
int ck(int k, std::pair<ll, ll> (&a)[]) {
int cnt = 0;
auto [x, y] = a[k];
for (int i = 1; i <= n; i++) {
auto [x1, y1] = a[i];
auto [x2, y2] = a[i + 1];
if (i != k && x1 == x && y1 < y) {
auto [x3, y3] = a[i - 1];
if (x1 == x3 || x1 == x2 || (std::min(x1, x2) == std::min(x1, x3) && std::min(x1, x2) == x1) || (std::max(x1, x2) == std::max(x1, x3) && std::max(x1, x2) == x1))
;
else
cnt++;
}
if (x1 < x && x < x2) {
if (y1 == y2 && y1 < y) {
cnt++;
continue;
}
if (x1 - x2 > 0) {
if ((y - y2) * (x1 - x2) > (x - x2) * (y1 - y2))
cnt++;
} else {
if ((y - y2) * (x1 - x2) < (x - x2) * (y1 - y2))
cnt++;
}
}
}
// std::cerr << cnt << '\n';
return cnt & 1 ^ 1;
}
void solve() {
std::cin >> n;
std::pair<ll, ll> a[n + 5];
for (int i = 1; i <= n; i++) {
std::cin >> a[i].first >> a[i].second;
}
a[n + 1] = a[1];
a[0] = a[n];
int ans = 0;
bool vis = 0;
for (int i = n; i >= 1; i--) {
if (a[i].second != a[1].second) {
if (a[i].second > a[1].second)
vis = 1;
break;
}
}
// bool vis = 0;
for (int i = 0; i <= n; i++) {
if (a[i + 1].second > a[i].second) {
if (vis) {
// std::cerr << i << " " << a[i].first << " " << a[i].second << " \n";
ans += ck(i, a);
}
vis = 0;
}
if (a[i + 1].second < a[i].second)
vis = 1;
}
std::cout << ans << '\n';
}
int main() {
std::ios::sync_with_stdio(0);
std::cin.tie(0), std::cout.tie(0);
int t = 1;
// std::cin >> t;
while (t--) {
solve();
}
}
詳細信息
Test #1:
score: 100
Accepted
time: 0ms
memory: 3612kb
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: 3688kb
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: 3660kb
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: 3692kb
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: 3544kb
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: 3608kb
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: 3548kb
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: 3544kb
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: 3628kb
input:
3 0 0 100 0 0 100
output:
1
result:
ok 1 number(s): "1"
Test #10:
score: 0
Accepted
time: 0ms
memory: 3616kb
input:
3 200 0 100 100 0 0
output:
1
result:
ok 1 number(s): "1"
Test #11:
score: 0
Accepted
time: 0ms
memory: 3604kb
input:
3 50 50 100 50 100 100
output:
1
result:
ok 1 number(s): "1"
Test #12:
score: 0
Accepted
time: 0ms
memory: 3544kb
input:
3 3 0 0 4 0 0
output:
1
result:
ok 1 number(s): "1"
Test #13:
score: 0
Accepted
time: 0ms
memory: 3624kb
input:
3 10000 10000 -10000 10000 10000 9999
output:
1
result:
ok 1 number(s): "1"
Test #14:
score: 0
Accepted
time: 0ms
memory: 3604kb
input:
3 10000 10000 -10000 10000 10000 9900
output:
1
result:
ok 1 number(s): "1"
Test #15:
score: 0
Accepted
time: 0ms
memory: 3544kb
input:
3 10000 10000 9999 10000 10000 -10000
output:
1
result:
ok 1 number(s): "1"
Test #16:
score: 0
Accepted
time: 0ms
memory: 3616kb
input:
3 0 0 200 0 100 173
output:
1
result:
ok 1 number(s): "1"
Test #17:
score: 0
Accepted
time: 0ms
memory: 3544kb
input:
3 0 0 200 0 100 1
output:
1
result:
ok 1 number(s): "1"
Test #18:
score: 0
Accepted
time: 0ms
memory: 3612kb
input:
3 -10000 -10000 10000 9999 9999 10000
output:
1
result:
ok 1 number(s): "1"
Test #19:
score: 0
Accepted
time: 0ms
memory: 3624kb
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: 3492kb
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: 3616kb
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: 3544kb
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: 3628kb
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: 3628kb
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: 3548kb
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: 3616kb
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: 3504kb
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: 3608kb
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: 3620kb
input:
4 0 100 55 55 100 0 100 100
output:
1
result:
ok 1 number(s): "1"
Test #30:
score: 0
Accepted
time: 0ms
memory: 3656kb
input:
8 0 0 100 0 100 20 40 20 40 40 100 40 100 60 0 60
output:
1
result:
ok 1 number(s): "1"
Test #31:
score: 0
Accepted
time: 0ms
memory: 3688kb
input:
12 0 0 90 0 90 30 40 30 40 40 90 40 90 50 0 50 0 20 50 20 50 10 0 10
output:
1
result:
ok 1 number(s): "1"
Test #32:
score: 0
Accepted
time: 0ms
memory: 3548kb
input:
12 0 0 100 0 100 100 10 100 10 110 200 110 200 60 101 60 101 40 210 40 210 120 0 120
output:
2
result:
ok 1 number(s): "2"
Test #33:
score: 0
Accepted
time: 0ms
memory: 3620kb
input:
10 1000 0 1100 0 1200 100 1220 200 1200 110 1100 10 1000 10 900 110 880 200 900 100
output:
1
result:
ok 1 number(s): "1"
Test #34:
score: 0
Accepted
time: 0ms
memory: 3552kb
input:
16 0 0 60 0 60 70 0 70 0 20 40 20 40 50 20 50 20 40 30 40 30 30 10 30 10 60 50 60 50 10 0 10
output:
2
result:
ok 1 number(s): "2"
Test #35:
score: 0
Accepted
time: 0ms
memory: 3548kb
input:
8 0 1 100 0 5 5 200 5 105 0 205 1 205 10 0 10
output:
2
result:
ok 1 number(s): "2"
Test #36:
score: 0
Accepted
time: 0ms
memory: 3628kb
input:
8 0 1 50 0 5 5 200 5 150 0 205 1 205 10 0 10
output:
2
result:
ok 1 number(s): "2"
Test #37:
score: 0
Accepted
time: 0ms
memory: 3616kb
input:
9 99 100 100 100 99 99 301 99 300 100 301 100 201 274 200 273 199 274
output:
1
result:
ok 1 number(s): "1"
Test #38:
score: 0
Accepted
time: 0ms
memory: 3544kb
input:
15 0 0 10 0 20 0 30 0 40 0 50 0 40 10 30 20 20 30 10 40 0 50 0 40 0 30 0 20 0 10
output:
1
result:
ok 1 number(s): "1"
Test #39:
score: 0
Accepted
time: 0ms
memory: 3688kb
input:
11 0 0 100 0 90 5 80 10 70 15 60 20 50 25 40 20 30 15 20 10 10 5
output:
1
result:
ok 1 number(s): "1"
Test #40:
score: 0
Accepted
time: 0ms
memory: 3692kb
input:
8 0 0 20 30 0 60 0 50 0 40 0 30 0 20 0 10
output:
1
result:
ok 1 number(s): "1"
Test #41:
score: 0
Accepted
time: 0ms
memory: 3632kb
input:
18 0 0 20 0 40 0 60 0 80 0 100 0 120 0 120 30 120 60 120 90 120 120 80 120 40 120 0 120 0 96 0 72 0 48 0 24
output:
1
result:
ok 1 number(s): "1"
Test #42:
score: 0
Accepted
time: 0ms
memory: 3544kb
input:
15 0 0 20 0 40 0 60 0 80 0 100 0 120 0 120 120 80 120 40 120 0 120 0 96 0 72 0 48 0 24
output:
1
result:
ok 1 number(s): "1"
Test #43:
score: 0
Accepted
time: 0ms
memory: 3692kb
input:
11 0 0 20 0 40 0 60 0 80 0 100 0 120 0 120 120 80 120 40 120 0 120
output:
1
result:
ok 1 number(s): "1"
Test #44:
score: 0
Accepted
time: 0ms
memory: 3616kb
input:
9 0 0 20 0 40 0 60 0 80 0 100 0 120 0 120 120 0 120
output:
1
result:
ok 1 number(s): "1"
Test #45:
score: 0
Accepted
time: 0ms
memory: 3624kb
input:
29 0 0 100 0 100 50 0 50 0 20 80 20 80 30 10 30 10 40 20 40 30 40 40 40 50 40 60 40 70 40 80 40 90 40 90 30 90 20 90 10 80 10 70 10 60 10 50 10 40 10 30 10 20 10 10 10 0 10
output:
2
result:
ok 1 number(s): "2"
Test #46:
score: -100
Wrong Answer
time: 0ms
memory: 3548kb
input:
24 0 0 100 0 100 100 200 100 200 0 300 0 300 100 300 200 200 200 200 300 300 300 300 400 300 500 200 500 200 400 100 400 100 500 0 500 0 400 0 300 100 300 100 200 0 200 0 100
output:
3
result:
wrong answer 1st numbers differ - expected: '2', found: '3'