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Submission #1044141

# Submission time Handle Problem Language Result Execution time Memory
1044141 2024-08-05T07:34:36 Z vjudge1 Svjetlost (COI18_svjetlost) C++17
0 / 100
 5 ms 600 KB 
#include <bits/stdc++.h>
using namespace std;
#define int long double
#define point pair<int,int>
#define x first
#define y second
int const pi=3.141592653589793;
int const oe=180;

int angle(point p1,point p2){
    int deltaY = p2.y - p1.y;
    int deltaX = p2.x - p1.x;
    int dg = (atan2(deltaY, deltaX) * oe) / pi;
    if(dg<0)
        dg+=360;
    return dg;
}

bool check(int a1,int a2){
    if(a1<=180)
        return (a2<a1) || (a2>a1+oe);
    else
        return (a2>a1-oe);
}
int dist(point a,point b){
    return sqrt(((a.x-b.x)*(a.x-b.x))+((a.y-b.y)*(a.y-b.y)));
}

int solve(vector<point> pts){
    int n=pts.size();
    if(n==1)
        return 0;
    else if(n==2)
        return dist(pts[0],pts[1]);
    for (int i = 0; i < n; ++i)
        pts.push_back(pts[i]);
    int len=dist(pts[0],pts[1])+dist(pts[1],pts[2]);
    int maxx=len;
    int p1=0,p2=2;
    while(p1<n){
        int a1=angle(pts[p1],pts[p1+1]);
        int a2=angle(pts[p2+1],pts[p2]);
        if(p2+1<p1+n && a1!=a2 && check(a1,a2)){
            len+=dist(pts[p2],pts[p2+1]);
            p2+=1;
        }
        else{
            len-=dist(pts[p1],pts[p1+1]);
            p1+=1;
        }
        maxx=max(maxx,len);
    }
    return maxx;
}

signed main(){
    int n;
    cin>>n;
    vector<point> pts(n);
    for (int i = 0; i < n; ++i)
        cin>>pts[i].x>>pts[i].y;
    cout<<fixed;
    cout<<setprecision(10)<<solve(pts)<<endl;
    return 0;
}

Subtask #1
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 344 KB 1st numbers differ - expected: '34724.8554753593', found: '62480.5291267818', error = '0.7993027839'
2 Halted 0 ms 0 KB -

Subtask #2
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 344 KB 1st numbers differ - expected: '34724.8554753593', found: '62480.5291267818', error = '0.7993027839'
2 Halted 0 ms 0 KB -

Subtask #3
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 348 KB 1st numbers differ - expected: '32934.3604541195', found: '62737.4121915526', error = '0.9049227411'
2 Halted 0 ms 0 KB -

Subtask #4
0 / 29.0

# Verdict Execution time Memory Grader output
1 Incorrect 5 ms 600 KB 1st numbers differ - expected: '1042655967.3918291330', found: '2075626430.8199260235', error = '0.9907107385'
2 Halted 0 ms 0 KB -

Subtask #5
0 / 31.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 344 KB 1st numbers differ - expected: '34724.8554753593', found: '62480.5291267818', error = '0.7993027839'
2 Halted 0 ms 0 KB -