oj.uz

답안 #916396

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
916396 2024-01-25T19:39:14 Z asdasdqwer Mobile (BOI12_mobile) C++14
80 / 100
 1000 ms 97028 KB 
#pragma GCC optimize("O3")

#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];

    vector<pii> tt;
    for (auto &x:v) {
        if (!tt.size()) {
            tt.push_back(x);
        }

        else if (tt.back()[0] == x[0] && abs(tt.back()[1]) > abs(x[1])) {
            tt.pop_back();
        }
        tt.push_back(x);
    }

    // v=tt;
    n=v.size();

    long double l = 1;
    long double r = 1e10;

    cout<<setprecision(15);

    // for (auto &x:v) {
    //     r = min(r, (long double)max(sqrt(x[0]*x[0] + x[1]*x[1]), sqrt((x[0]-t)*(x[0]-t) + x[1]*x[1])));
    // }

    // cout<<r<<"\n";

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

            // if (rem[i]) {
            //     i++;
            //     continue;
            // }
    
            else {
                long double aa=(double)abs(x[1]);
                long double dis=sqrt(m*m-aa*aa);
                array<long 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], (long double)0.0);
                    pos1[1]=min(pos1[1], (long double)t);
                    if (pos1[0] == 0.0 && pos1[1] == t) {
                        all=true;
                        break;
                    }

                    start.push_back(pos1);
                }
            }
    
            i++;
        }

        if (all) {
            r=m;
            continue;
        }

        bool possible=true;

        double e=0.0;

        for (auto &x:start) {
            if (x[0] <= e && x[1] > e) {
                e=x[1];
            }
        }

        if (e<t) possible=false;
    
        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();
            //     rem.pop_back();
            // }
    
            // for (int i=0;i<n;i++) {
            //     rem[i]=false;
            // }
        }
    
        else {
            l=m;
            // for (i=0;i<n;i++) {
            //     rem[i]=false;
            // }
        }
    }
    cout<<r<<"\n";
}

Subtask #1
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 600 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

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct

Subtask #3
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 604 KB Output is correct
2 Correct 3 ms 808 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 2 ms 604 KB Output is correct

Subtask #4
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 604 KB Output is correct
2 Correct 6 ms 1332 KB Output is correct
3 Correct 3 ms 904 KB Output is correct
4 Correct 2 ms 720 KB Output is correct

Subtask #5
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 856 KB Output is correct
2 Correct 6 ms 1012 KB Output is correct
3 Correct 3 ms 904 KB Output is correct
4 Correct 2 ms 604 KB Output is correct

Subtask #6
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 764 KB Output is correct
2 Correct 6 ms 1112 KB Output is correct
3 Correct 3 ms 880 KB Output is correct
4 Correct 2 ms 604 KB Output is correct
5 Correct 2 ms 604 KB Output is correct

Subtask #7
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 45 ms 7164 KB Output is correct
2 Correct 67 ms 11840 KB Output is correct
3 Correct 51 ms 6024 KB Output is correct
4 Correct 24 ms 5072 KB Output is correct
5 Correct 11 ms 2720 KB Output is correct

Subtask #8
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 19 ms 3900 KB Output is correct
2 Correct 20 ms 4508 KB Output is correct
3 Correct 24 ms 5332 KB Output is correct
4 Correct 30 ms 5648 KB Output is correct
5 Correct 32 ms 5816 KB Output is correct

Subtask #9
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 112 ms 10424 KB Output is correct
2 Correct 57 ms 11280 KB Output is correct
3 Correct 44 ms 7960 KB Output is correct
4 Correct 37 ms 6520 KB Output is correct
5 Correct 27 ms 5064 KB Output is correct

Subtask #10
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 90 ms 11100 KB Output is correct
2 Correct 75 ms 11904 KB Output is correct
3 Correct 56 ms 11640 KB Output is correct
4 Correct 37 ms 6556 KB Output is correct
5 Correct 29 ms 6132 KB Output is correct

Subtask #11
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 84 ms 10372 KB Output is correct
2 Correct 77 ms 11408 KB Output is correct
3 Correct 55 ms 12464 KB Output is correct
4 Correct 36 ms 6552 KB Output is correct
5 Correct 29 ms 5936 KB Output is correct

Subtask #12
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 692 ms 48480 KB Output is correct
2 Correct 407 ms 48416 KB Output is correct
3 Correct 411 ms 55816 KB Output is correct
4 Correct 174 ms 39864 KB Output is correct
5 Correct 141 ms 29316 KB Output is correct

Subtask #13
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 421 ms 48472 KB Output is correct
2 Correct 403 ms 49480 KB Output is correct
3 Correct 389 ms 50756 KB Output is correct
4 Correct 166 ms 33784 KB Output is correct
5 Correct 146 ms 35520 KB Output is correct

Subtask #14
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1030 ms 70948 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #15
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 695 ms 69496 KB Output is correct
2 Correct 468 ms 57160 KB Output is correct
3 Correct 334 ms 59004 KB Output is correct
4 Correct 234 ms 44912 KB Output is correct
5 Correct 179 ms 40916 KB Output is correct

Subtask #16
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1020 ms 73976 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #17
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 681 ms 74136 KB Output is correct
2 Correct 563 ms 81932 KB Output is correct
3 Correct 455 ms 65476 KB Output is correct
4 Correct 235 ms 51136 KB Output is correct
5 Correct 211 ms 49000 KB Output is correct

Subtask #18
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1056 ms 75592 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #19
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 870 ms 76804 KB Output is correct
2 Correct 602 ms 88932 KB Output is correct
3 Correct 558 ms 87632 KB Output is correct
4 Correct 321 ms 58728 KB Output is correct
5 Correct 242 ms 52416 KB Output is correct

Subtask #20
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1049 ms 82712 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #21
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 915 ms 83140 KB Output is correct
2 Correct 766 ms 97028 KB Output is correct
3 Correct 804 ms 94412 KB Output is correct
4 Correct 357 ms 77292 KB Output is correct
5 Correct 306 ms 72928 KB Output is correct