mirror of
https://github.com/Kiritow/OJ-Problems-Source.git
synced 2024-03-22 13:11:29 +08:00
111 lines
3.6 KiB
C++
111 lines
3.6 KiB
C++
#include <stdio.h>
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#include <stdlib.h>
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#include <math.h>
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#include <string.h>
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#include <ctype.h>
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#include <time.h>
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#include <iostream>
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#include <algorithm>
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#include <queue>
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#include <vector>
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#include <map>
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#include <set>
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#include <stack>
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#include <list>
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#include <string>
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using namespace std;
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#define INF 0x7F7F7F7F
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#define eps 1e-8
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typedef long long LL;
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typedef vector<int> VI;
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typedef vector<string> VS;
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typedef pair <int , int> PII;
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#define PB push_back
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#define MP make_pair
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#define CL(a,b) memset ( a , b , sizeof ( a ) )
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#define CLN(a,n,b) memset ( a , b , n * sizeof ( size ) )
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#define FOR(a,b,i) for ( i = a ; i < b ; i++ )
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#define REP(i,n) FOR ( 0 , n , i )
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#define FORB(b,a,i) for ( i = b ; i > a ; i-- )
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#define FORE(a,b,i) for ( i = a ; i <= b ; i++ )
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#define FOREB(b,a,i) for ( i = b ; i >= a ; i-- )
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#define COPY(a,b,lt,rt,i) for ( i = lt ; i <= rt ; i++ ) a[i] = b[i];
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#define sqr(a,b) sqrt ( (double) (a) * (a) + (double) (b) * (b) )
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template <class T> inline T INT_LEN( T v ) { int len = 1 ; while ( v /= 10 ) ++len; return len; }
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template <class T> inline double DIS ( T a , T b ) { return sqr ( a.x - b.x , a.y - b.y ); }
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typedef struct {
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double x , y;
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}tc;
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tc w[2] , t[2];
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double vw , vt , mn , mx;
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bool input (){
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while ( ~scanf ( "%lf" , &w[0].x ) ){
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scanf ( "%lf%lf%lf%lf" , &w[0].y , &w[1].x , &w[1].y , &vw );
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scanf ( "%lf%lf%lf%lf%lf" , &t[0].x , &t[0].y , &t[1].x , &t[1].y , &vt );
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scanf ( "%lf%lf" , &mn , &mx );
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return true;
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}
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return false;
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}
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template < typename T >
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double dot ( T a , T b , T c ){
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return ( b.x - a.x ) * ( c.x - a.x ) + ( b.y - a.y ) * ( c.y - a.y );
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}
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template < typename T >
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double det ( T a , T b , T c ){
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return ( b.x - a.x ) * ( c.y - a.y ) - ( b.y - a.y ) * ( c.x - a.x );
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}
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double get_dis ( tc fro , tc to , tc o , double dx , double dy ){
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fro.x += dx , fro.y += dy;
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to.x += dx , to.y += dy;
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double dis1 = DIS ( o , fro );
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double dis2 = DIS ( o , to );
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double d = min ( dis1 , dis2 );
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double di = DIS ( fro , to );
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if ( di <= eps ){
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return d;
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}else if ( dot ( fro , o , to ) >= -eps && dot ( to , o , fro ) >= -eps ){
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return fabs ( det ( fro , to , o ) ) / di;
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}else {
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return d;
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}
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}
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double calc ( tc fro , tc to , tc o , double dx , double dy){
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int lt = 0 , rt = INF , mid;
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double dis1 , dis2;
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while ( lt <= rt ){
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mid = ( lt + rt ) >> 1;
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dis1 = get_dis ( fro , to , o , dx * mid , dy * mid );
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dis2 = get_dis ( fro , to , o , dx * -~mid , dy * -~mid );
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if ( dis1 <= dis2 + eps ) rt = ~-mid;
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else lt = -~mid;
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}
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return get_dis ( fro , to , o , dx * lt , dy * lt );
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}
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void solve (){
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tc tg , wg , p1 , p2;
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double L1 = DIS ( t[0] , t[1] );
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tg.x = ( t[1].x - t[0].x ) * vt / L1;
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tg.y = ( t[1].y - t[0].y ) * vt / L1;
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double L2 = DIS ( w[0] , w[1] );
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wg.x = ( w[1].x - w[0].x ) * vw / L2;
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wg.y = ( w[1].y - w[0].y ) * vw / L2;
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double time = L1 / vt;
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p1.x = t[0].x + ( tg.x - wg.x ) * time;
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p1.y = t[0].y + ( tg.y - wg.y ) * time;
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p2.x = p1.x + ( -tg.x - wg.x ) * time;
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p2.y = p1.y + ( -tg.y - wg.y ) * time;
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double d1 = calc ( t[0] , p1 , w[0] , p2.x - t[0].x , p2.y - t[0].y );
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double d2 = calc ( p1 , p2 , w[0] , p2.x - t[0].x , p2.y - t[0].y );
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double d = min ( d1 , d2 );
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if ( d + eps < mn ) puts ( "Dangerous" );
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else if ( d - eps > mx ) puts ( "Miss" );
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else puts ( "Perfect" );
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}
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int main (void){
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while ( input () ){
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solve ();
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}
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return 0;
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}
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