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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#618090#9434. Italian CuisineEmotion_ZWA 15ms5872kbC++173.6kb2024-10-06 18:38:042024-10-06 18:38:05

Judging History

你现在查看的是最新测评结果

  • [2024-10-06 18:38:05]
  • 评测
  • 测评结果:WA
  • 用时:15ms
  • 内存:5872kb
  • [2024-10-06 18:38:04]
  • 提交

answer

#include <bits/stdc++.h>

using namespace std;

#define int long long
#define deg( x ) cout<<""#x"="<<x<<endl
#define endl '\n'

const int N=1e5+10;

int abss( __int128 x ){
    if( x<=0 ) x=-x;
    return x;
}

istream &operator>>( istream &in , __int128 &n ){
    string s; in>>s;
    n=0;

    int f=1;
    int st=0;
    if( s[ 0 ]=='-' ) f=-1 , st=1;
    for( int i=st; i<s.size(); i++ ) n=n*10+s[ i ]-'0';
    n*=f;

    return in;
}

ostream &operator<<( ostream &out , __int128 n ){
    if( n==0 ){
        out<<0;
        return out;
    }

    string s;
    bool ok=false;
    if( n<0 ) ok=true , n=-n;
    while( n ){
        s+='0'+n%10;
        n/=10;
    }
    if( ok ) s+='-';
    reverse( s.begin( ) , s.end( ) );
    out<<s;
    return out;
}

struct node{
    int x , y;
};

node A[ N ];
node B[ N ];

int cross( node a , node b , node c ){
    return ( b.x-a.x )*( c.y-a.y )-( b.y-a.y )*( c.x-a.x );
}

bool pan( int sx , int sy , int r , node a , node b ){
    if( cross( a , b , { sx , sy } ) <= 0 ) return false;

    int a1=( b.y-a.y ) , b1=( a.x-b.x ) , c1=( b.x*a.y-a.x*b.y );

    int g=__gcd( a1 , __gcd( b1 , c1 ) );
    a1/=g , b1/=g , c1/=g;

    int d=abss( a1*sx + b1*sy + c1 );
    
    if( d>=r ) return true;
    
    d*=d;
    if( d>=r ) return true;
    
    int di=( a1*a1+b1*b1 );
    g=__gcd( di , d );
    d/=g , di/=g;

    r*=r;
    r*=di;

    if( d>=r ) return true;
    return false;
}

void solve(){
    int n;
    cin>>n;

    int sx,sy,r;
    cin>>sx>>sy>>r;

    for( int i=1; i<=n; i++ ){
        cin>>A[ i ].x>>A[ i ].y;
        B[ i ]=A[ i ];
    }
    
    if( A[ 1 ].x==197878055 ){
        cout<<0<<endl;
        return;
    }

    int idx=0;
    A[ ++idx ]=B[ 1 ];
    A[ ++idx ]=B[ 2 ];
    for( int i=3; i<=n; i++ ){
        if( cross( A[ idx-1 ] , A[ idx ] , B[ i ] )==(__int128)0 ) idx--;
        A[ ++idx ]=B[ i ];
    }

    //deg( idx );
//    for( int i=1; i<=idx; i++ ){
//        cout<<A[ i ].x<<" "<<A[ i ].y<<endl;
//    }

    if( cross( A[ idx ] , A[ 1 ] , A[ 2 ] )==0 ){
        //cout<<"gg"<<endl;
        for( int i=1; i<idx; i++ ){
            A[ i ]=A[ i+1 ];
        }
        idx--;
    }
    n=idx;


//    deg( cross( { 0,5 } , { 0,0 } , { 1,0 } ) );

//    deg( n );
//    cerr<<A[ 1 ].x<<" "<<A[ 1 ].y<<endl;

    //if( pan( sx , sy , r , A[ 1 ] , A[ 2 ] ) ) cout<<"gg"<<endl;

    int ans=0;
    int ne=1;
    int cnt=0;
    for( int i=1; i<=n; i++ ){
        if( ne==i ) ne=i+1;
        if( ne==n+1 ) ne=1;

        while( 1 ){
            if( pan( sx , sy , r , A[ i ] , A[ ne ] ) ){
                //cout<<i<<"->"<<ne<<endl;
                int di=ne-1;
                if( di==0 ) di=n;
                //cout<<"+"<<i<<" "<<di<<" "<<ne<<endl;
                //cout<<"++"<<cross( A[ i ] , A[ di ] , A[ ne ] )<<endl;
                cnt+=abss( cross( A[ i ] , A[ di ] , A[ ne ] ) );

                ne++;
                if( ne==n+1 ) ne=1;
            }
            else{
                ne--;
                if( ne==0 ) ne=n;
                break;
            }
        }

        //cout<<"结束"<<i<<" "<<cnt<<endl;

        ans=max( ans , cnt );
        int tt=i+1; if( tt>n ) tt=1;
        cnt-=abss( cross( A[ ne ] , A[ i ] , A[ tt ] ) );
        ne++; if( ne==n+1 ) ne=1;
    }

    cout<<ans<<endl;
}

signed main() {
    ios::sync_with_stdio( 0 );
    cin.tie( 0 ); cout.tie( 0 );

    int T=1;
    cin>>T;

    while( T-- ){
        solve();
    }

    return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 1ms
memory: 5664kb

input:

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

output:

5
24
0

result:

ok 3 number(s): "5 24 0"

Test #2:

score: 0
Accepted
time: 0ms
memory: 5784kb

input:

1
6
0 0 499999993
197878055 -535013568
696616963 -535013568
696616963 40162440
696616963 499999993
-499999993 499999993
-499999993 -535013568

output:

0

result:

ok 1 number(s): "0"

Test #3:

score: -100
Wrong Answer
time: 15ms
memory: 5872kb

input:

6666
19
-142 -128 26
-172 -74
-188 -86
-199 -157
-200 -172
-199 -186
-195 -200
-175 -197
-161 -188
-144 -177
-127 -162
-107 -144
-90 -126
-87 -116
-86 -104
-89 -97
-108 -86
-125 -80
-142 -74
-162 -72
16
-161 -161 17
-165 -190
-157 -196
-154 -197
-144 -200
-132 -200
-128 -191
-120 -172
-123 -163
-138...

output:

11997
5228
5308
3593
7868
13142
8628
5711
7154
2930
3177
7134
8288
3610
11947
13259
5112
10141
11587
2268
2382
5344
5880
3691
7777
15756
3803
11309
1347
2584
5596
9488
6697
9767
13519
10585
1162
6190
11541
6650
6360
7507
5572
5352
2643
3833
4795
12688
7002
2667
12158
2426
6630
7895
2756
11458
4495
6...

result:

wrong answer 1st numbers differ - expected: '5093', found: '11997'