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Submission #96211

# Submission time Handle Problem Language Result Execution time Memory
96211 2019-02-07T05:30:47 Z easrui Mobile (BOI12_mobile) C++14
8 / 100
 1000 ms 47360 KB 
#include <bits/stdc++.h>
using namespace std;
const int MN = 1e6+5;
int N,L,C[MN],num[MN],cur,pos;
double X[MN],Y[MN],A[MN],B[MN],Ipos[MN],x,ans=0,tmp;

bool cmp(int a, int b)
{
    if(B[a]==B[b]) return A[a]<A[b];
    return B[a]<B[b];
}

double getI(int a, int b)
{
     return (B[a]-B[b])/(A[b]-A[a]);
}

int main()
{
    //freopen("C:\\Users\\user\\Desktop\\input.txt","r",stdin);
    cin >> N >> L;
    for(int i=0; i<N; i++){
        cin >> X[i] >> Y[i];
        A[i] = -2*X[i];
        B[i] = X[i]*X[i]+Y[i]*Y[i];
        num[i] = i;
    }
    sort(num,num+N,cmp);
    Ipos[pos] = 0;
    C[pos] = num[0];
    for(int i=1; i<N; i++){
        cur = num[i];
        //cout << cur << '\n';
        while(1){
            x = getI(C[pos],cur);
            if(x<=0 || x>=L) break;
            if(x>Ipos[pos]){
                Ipos[++pos] = x;
                C[pos] = cur;
                break;
            }
            pos--;
        }
    }
    Ipos[pos+1] = L;
    for(int i=0; i<=pos; i++){
        cur = C[i];
        //cout << X[cur] << '\n';
        tmp = max((Ipos[i]-X[cur])*(Ipos[i]-X[cur]),(Ipos[i+1]-X[cur])*(Ipos[i+1]-X[cur]))+Y[cur]*Y[cur];
        /*if(X[cur]<Ipos[i]) tmp = (Ipos[i]-X[cur])*(Ipos[i]-X[cur])+Y[cur]*Y[cur];
        else if(X[cur]>Ipos[i]) tmp = (Ipos[i+1]-X[cur])*(Ipos[i+1]-X[cur])+Y[cur]*Y[cur];
        else tmp = B[cur];*/
        ans = max(ans,tmp);
    }
    cout << sqrt(ans);
}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct

Subtask #2
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct

Subtask #3
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 504 KB Output is correct
2 Correct 4 ms 504 KB Output is correct
3 Correct 3 ms 376 KB Output is correct
4 Incorrect 5 ms 476 KB Output isn't correct

Subtask #4
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 504 KB Output is correct
2 Incorrect 7 ms 504 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 504 KB Output is correct
2 Incorrect 6 ms 504 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #6
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 504 KB Output is correct
2 Incorrect 7 ms 504 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #7
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 78 ms 3064 KB Output is correct
2 Incorrect 87 ms 3068 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #8
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 76 ms 3064 KB Output is correct
2 Correct 75 ms 3716 KB Output is correct
3 Incorrect 92 ms 4344 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #9
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 87 ms 4472 KB Output is correct
2 Incorrect 90 ms 3232 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #10
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 118 ms 4016 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #11
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 119 ms 4300 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #12
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 419 ms 23900 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #13
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 619 ms 17996 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #14
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 512 ms 28620 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #15
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 728 ms 21504 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #16
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 616 ms 33376 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #17
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 906 ms 24944 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #18
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 687 ms 37888 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #19
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1008 ms 28732 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #20
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 866 ms 47360 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #21
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1077 ms 33404 KB Time limit exceeded
2 Halted 0 ms 0 KB -