QOJ.ac

QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#138146#2350. Integer CowDelay_for_five_minutesWA 9ms3492kbC++202.0kb2023-08-11 01:38:152023-08-11 01:38:15

Judging History

你现在查看的是最新测评结果

  • [2023-08-11 01:38:15]
  • 评测
  • 测评结果:WA
  • 用时:9ms
  • 内存:3492kb
  • [2023-08-11 01:38:15]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define y0 Y0
int xc , yc , r ,x0 , y0;
const int D = 5e4;
double ans;
int px , py , pr;
long long pf(int x)
{
    return 1LL*x*x;
}
bool in_cir(int x,int y)
{
    return (pf(x - x0) + pf(y - y0) <= pr);
}
void chk_ans(int x,int y)
{
    double sol = sqrt(1LL*x*x + 1LL*y*y);
    if(sol < ans) {
        ans = sol ;
        px = x;py = y;
    }
}
const double eps = 1e-6;
void solve()
{
    cin >> x0 >> y0 >> r >> xc >> yc;
    ans = 1e18; pr = pf(r);
    x0 -= xc ; y0 -= yc;
    if(1LL * x0*x0 + 1LL*y0*y0 <= 1LL*r*r) {
        cout << 0 << '\n';
        cout << xc <<' ' << yc << '\n';
        return;
    }
    double ix ;
    if(x0 == 0) {
        ix = 0 ;
    }
    else {
        double k = (double)y0 / x0;
        //cout << k << '\n';
        //cout << x0 <<' ' << y0 << '\n';
        double a = k*k + 1 , b = -(2*x0 + 2*k*y0) , c = (1LL*x0*x0 + 1LL*y0*y0 - 1LL*r*r) ;
        double delta = sqrt(b*b - 4*a*c) ;
        //cout << a <<' ' << b <<' ' << c << '\n';
        double x1 = (-b + delta) / (2 * a) , x2 = (-b - delta) / (2 * a) ;

        if(fabs(x1) < fabs(x2)) ix = x1;
        else ix = x2;
    }
    //cout << ix << '\n';
    int R = ix + D;
    for(int i = ix - D ; i <= R ; i++) {
        double d = 1LL*r*r - 1LL*(i - x0)*(i - x0) ;
        if(d < 0) continue;
        d = sqrt(d);
        double yl = d + y0 , yr = -d + y0;
        int ul = yl - 2 - eps , ur = yr + 2 + eps;
        if(ul > ur) continue;
        for(int x = 0 ; x <= 2 && !in_cir(i , ul);x++) ul++;
        for(int x = 0 ; x <= 2 && !in_cir(i , ur);x++) ur--;
      //  printf("U %d %d\n",ul,ur);
        if(ur < 0) chk_ans(i , ur);
        else if(ul > 0) chk_ans(i , ul);
        else chk_ans(i , 0);
    }
    cout << 1 << '\n';
    cout << xc <<' ' << yc <<' ' << (px + xc) <<' ' << (py + yc) << '\n';
}
int main(){
 //   freopen("in.txt","r",stdin);
    ios::sync_with_stdio(false) ; cin.tie(0) ; cout.tie(0);
    int t;cin >> t;
    while(t--) solve();
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 1ms
memory: 3464kb

input:

3
1 2 1 1 2
3 2 5 -10 3
0 0 1 10 0

output:

0
1 2
1
-10 3 -2 2
1
10 0 1 0

result:

ok correct (3 test cases)

Test #2:

score: 0
Accepted
time: 1ms
memory: 3464kb

input:

1
0 0 1 0 0

output:

0
0 0

result:

ok correct (1 test case)

Test #3:

score: -100
Wrong Answer
time: 9ms
memory: 3492kb

input:

100
-1 0 2 -3 -2
0 -2 2 -2 0
2 -1 1 0 1
-1 -3 1 -1 0
-1 2 2 -1 -1
2 -2 2 0 -3
-2 -3 2 -3 -2
0 1 2 2 1
-1 0 1 -2 -2
2 -2 2 -1 -2
1 2 2 -2 2
-1 2 1 -1 2
-2 1 2 -3 -2
-1 1 1 -1 1
2 2 1 1 -3
2 0 1 -2 -1
-1 2 1 -2 0
2 -2 2 -2 -1
-2 -2 1 1 -2
-1 1 2 2 1
2 -3 1 0 -1
-3 -3 2 2 -1
2 1 1 -1 1
-3 -2 1 -2 -3
0 ...

output:

1
-3 -2 -2 -1
1
-2 0 -1 -1
1
0 1 1 -1
1
-1 0 -1 -2
1
-1 -1 -1 1
1
0 -3 0 -2
0
-3 -2
0
2 1
1
-2 -2 -1 -1
1
-1 -2 0 -2
1
-2 2 -1 2
0
-1 2
1
-3 -2 -3 0
0
-1 1
1
1 -3 2 1
1
-2 -1 1 0
1
-2 0 -1 1
1
-2 -1 0 -2
1
1 -2 -1 -2
1
2 1 1 1
1
0 -1 1 -3
1
2 -1 -1 -3
1
-1 1 1 1
1
-2 -3 -3 -3
0
-2 -2
0
-2 -2
0
1 -1
...

result:

wrong answer the distance of your solution has travelled is longer than expected. (test case 5)