| # |
제출 시각 |
아이디 |
문제 |
언어 |
결과 |
실행 시간 |
메모리 |
| 131963 |
2019-07-18T07:00:05 Z |
임유진(#3191) |
Fences (JOI18_fences) |
C++14 |
|
2 ms |
376 KB |
#include <bits/stdc++.h>
using namespace std;
#define fi first
#define se second
#define mp make_pair
typedef long double ld;
typedef long long lint;
typedef pair<lint, lint> pll;
lint dp(pll a, pll b) { return a.fi * b.fi + a.se * b.se; }
ld len(pll a) { return sqrt((ld) dp(a, a)); }
pll mns(pll a, pll b) { return mp(a.fi - b.fi, a.se - b.se); }
ld dis(pll a, pll b) { return len(mns(a, b)); }
ld perp(pll u, pll v) { return sqrt(dp(v, v) - dp(u, v) * dp(u, v) / dp(u, u)); }
void print(pll a) { printf("(%lld, %lld)\n", a.fi, a.se);}
int main() {
int N, S, A, B, C, D;
scanf("%d%d", &N, &S);
if(N != 1) return 0;
scanf("%d%d%d%d", &A, &B, &C, &D);
if(A + C < 0) {
A *= -1;
C *= -1;
}
if(B + D < 0) {
B *= -1;
D *= -1;
}
if(A - B > C - D) {
swap(A, C);
swap(B, D);
}
//printf("(%d, %d), (%d, %d)\n", A, B, C, D);
ld ans = 8.0L * S;
ld a, b;
if(B < S) a = dis(mp(A, B), mp(S, S)) + 2 * S;
else {
pll p1 = mp(A, B), p2 = mp(C, D), x = mp(-S, S);
pll u = mns(p2, p1), v1 = mns(p1, x), v2 = mns(p2, x);
//print(v1);
if(dp(u, v1) < 0 && dp(u, v2) > 0) {/*printf("*");*/a = perp(u, v1);}
else a = len(v1);
}
swap(A, D);
swap(B, C);
if(B < S) b = dis(mp(A, B), mp(S, S)) + 2 * S;
else {
//printf("!");
pll p1 = mp(A, B), p2 = mp(C, D), x = mp(-S, S);
pll u = mns(p2, p1), v1 = mns(p1, x), v2 = mns(p2, x);
if(dp(u, v1) < 0 && dp(u, v2) > 0) b = perp(u, v1);
else b = len(v1);
}
ans = min(ans, a + b + 4 * S);
//printf("a = %Lf, b = %Lf\n", a, b);
printf("%Lf", ans);
return 0;
}
Compilation message
fences.cpp: In function 'int main()':
fences.cpp:22:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d", &N, &S);
~~~~~^~~~~~~~~~~~~~~~
fences.cpp:24:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d%d%d", &A, &B, &C, &D);
~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
2 ms |
376 KB |
Output is correct |
| 2 |
Correct |
2 ms |
376 KB |
Output is correct |
| 3 |
Correct |
2 ms |
256 KB |
Output is correct |
| 4 |
Correct |
2 ms |
256 KB |
Output is correct |
| 5 |
Correct |
2 ms |
376 KB |
Output is correct |
| 6 |
Correct |
2 ms |
376 KB |
Output is correct |
| 7 |
Incorrect |
2 ms |
376 KB |
Output isn't correct |
| 8 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
2 ms |
376 KB |
Output is correct |
| 2 |
Correct |
2 ms |
376 KB |
Output is correct |
| 3 |
Correct |
2 ms |
256 KB |
Output is correct |
| 4 |
Correct |
2 ms |
256 KB |
Output is correct |
| 5 |
Correct |
2 ms |
376 KB |
Output is correct |
| 6 |
Correct |
2 ms |
376 KB |
Output is correct |
| 7 |
Incorrect |
2 ms |
376 KB |
Output isn't correct |
| 8 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
2 ms |
376 KB |
Output is correct |
| 2 |
Correct |
2 ms |
376 KB |
Output is correct |
| 3 |
Correct |
2 ms |
256 KB |
Output is correct |
| 4 |
Correct |
2 ms |
256 KB |
Output is correct |
| 5 |
Correct |
2 ms |
376 KB |
Output is correct |
| 6 |
Correct |
2 ms |
376 KB |
Output is correct |
| 7 |
Incorrect |
2 ms |
376 KB |
Output isn't correct |
| 8 |
Halted |
0 ms |
0 KB |
- |
