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Submission #916286

# Submission time Handle Problem Language Result Execution time Memory
916286 2024-01-25T15:20:45 Z asdasdqwer Mobile (BOI12_mobile) C++14
8 / 100
 1000 ms 48304 KB 
#include <bits/stdc++.h>
using namespace std;

#define int int64_t
#define pii array<int,2>

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

    int n,t;cin>>n>>t;
    vector<pii> v(n);
    for (auto &x:v)cin>>x[0]>>x[1];

    double l = 1;
    double r = 1e9;
    vector<bool> rem(n, false);

    while (abs(l-r) > 0.0001) {
        double m = (l+r)/2.0;
        int i=0;
        vector<array<double,2>> start;
        for (auto &x:v) {
            if ((double)abs(x[1]) >= m) {
                rem[i]=true;
            }

            else {
                double aa=abs(x[1]);
                double dis=sqrt(m*m-aa*aa);
                array<double,2> pos1 = {x[0]-dis,x[0]+dis};
                if ((pos1[0] < 0.0 && pos1[1] < 0.0) || (pos1[0] > (double)t && pos1[1] > (double)t)) {
                    rem[i]=true;
                }

                else {
                    pos1[0]=max(pos1[0], 0.0);
                    pos1[1]=min(pos1[1], (double)t);
                    start.push_back(pos1);
                }
            }

            i++;
        }

        start.push_back({0.0, 0.0});
        start.push_back({(double)t,(double)t});

        sort(start.begin(),start.end());

        array<double,2> pos={0.0, 0.0};
        bool possible=true;

        for (auto &x:start) {
            if (x[0] <= pos[1]) {
                pos[1]=max(pos[1], x[1]);
            }

            else {
                possible=false;
                break;
            }
        }

        if (possible) {
            r=m;
            int cnt=0;
            int pt=0;
            for (int i=0;i<n;i++) {
                if (rem[i]) {
                    cnt++;
                }
                
                else if (cnt != 0) {
                    swap(v[i], v[pt]);
                }

                if (!rem[i]) {
                    pt++;
                }
            }

            n -= cnt;

            while (v.size() != n){
                v.pop_back();
            }

            for (int i=0;i<n;i++) {
                rem[i]=false;
            }
        }

        else {
            l=m;
            for (int i=0;i<n;i++) {
                rem[i]=false;
            }
        }
    }

    cout<<r<<"\n";
}

Compilation message

mobile.cpp: In function 'int main()':
mobile.cpp:85:29: warning: comparison of integer expressions of different signedness: 'std::vector<std::array<long int, 2> >::size_type' {aka 'long unsigned int'} and 'int64_t' {aka 'long int'} [-Wsign-compare]
   85 |             while (v.size() != n){
      |                    ~~~~~~~~~^~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct

Subtask #2
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct

Subtask #3
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 604 KB Output is correct
2 Correct 5 ms 604 KB Output is correct
3 Correct 2 ms 348 KB Output is correct
4 Incorrect 2 ms 488 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #4
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 744 KB Output is correct
2 Incorrect 11 ms 744 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 748 KB Output is correct
2 Incorrect 10 ms 748 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 748 KB Output is correct
2 Incorrect 10 ms 748 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #7
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 99 ms 4896 KB Output is correct
2 Incorrect 250 ms 4952 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #8
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 119 ms 5824 KB Output is correct
2 Correct 94 ms 4796 KB Output is correct
3 Incorrect 87 ms 5108 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #9
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 257 ms 5388 KB Output is correct
2 Incorrect 273 ms 5136 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #10
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 283 ms 5684 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #11
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 106 ms 5656 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #12
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1058 ms 24780 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #13
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1034 ms 24528 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #14
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1035 ms 37440 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #15
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1044 ms 36220 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #16
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1012 ms 41020 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #17
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1027 ms 39408 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #18
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1037 ms 42788 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #19
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1053 ms 43136 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #20
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1051 ms 48300 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #21
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1040 ms 48304 KB Time limit exceeded
2 Halted 0 ms 0 KB -