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답안 #553416

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
553416 2022-04-25T19:28:01 Z Hona_Nguyen Mobile (BOI12_mobile) C++14
0 / 100
 1000 ms 48160 KB 
#include<bits/stdc++.h>
#define prob "mobile"
#define x first
#define y second
using namespace std;
const int maxn = 1e6;
const int MOD = 1e9 + 7;
const double eps = 1e-9;
int n,L;
pair<double,double> p[maxn+5];
int main(){
//    freopen(prob".inp","r",stdin);
//    freopen(prob".out","w",stdout);
    ios_base::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
    cin >> n >> L;
    for(int i=1;i<=n;i++) cin >> p[i].x >> p[i].y;
    auto check = [&](double val) -> int{
        vector<pair<double,double>> G;
        for(int i=1;i<=n;i++){
            if(val < p[i].y) return 0;
            double tmp = sqrt(val*val-p[i].y*p[i].y);
            double xL = p[i].x - tmp;
            double xR = p[i].x + tmp;
            G.push_back(make_pair(xL,xR));
        }
        sort(G.begin(),G.end(), [](const pair<double,double> A, const pair<double,double> B){
             if(A.first == B.first) return A.second < B.second;
             return A.first < B.first;
             });
        double curx = 0;
        for(int i=0;i<n;i++){
            if(G[i].x <= curx){
               curx = max(curx, G[i].y);
            }
        }
        if(curx >= (double)(L)) return 1;
        return 0;
    };
    double low = 1, high = (double)(2e9), res = 0;
    for(int i=1;i<=50;i++){
        if(high < low) break;
        double mid = (low + high) / (double)(2);
        if(check(mid)){
            res = mid;
            high = mid;
        }
        else{
            low = mid;
        }
    }
    cout << fixed << setprecision(4);
    cout << res;
}

Subtask #1
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 7 ms 480 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 14 ms 608 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 17 ms 632 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 14 ms 612 KB Output is correct
2 Correct 17 ms 612 KB Output is correct
3 Incorrect 12 ms 624 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #7
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 208 ms 4740 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 323 ms 4836 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 255 ms 5240 KB Output is correct
2 Correct 383 ms 5036 KB Output is correct
3 Incorrect 302 ms 5072 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #10
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 391 ms 5520 KB Output is correct
2 Correct 435 ms 5532 KB Output is correct
3 Incorrect 395 ms 5616 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #11
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 332 ms 5580 KB Output is correct
2 Correct 447 ms 5532 KB Output is correct
3 Incorrect 443 ms 5532 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #12
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1087 ms 24408 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #13
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1095 ms 24296 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #14
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1096 ms 35724 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #15
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1088 ms 35656 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #16
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1064 ms 38808 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #17
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1084 ms 38644 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #18
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1087 ms 42024 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #19
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1091 ms 42028 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #20
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1088 ms 48160 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #21
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1095 ms 48036 KB Time limit exceeded
2 Halted 0 ms 0 KB -