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답안 #687129

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
687129 2023-01-26T06:31:43 Z nikhil_kumart21 Mobile (BOI12_mobile) C++17
0 / 100
 1000 ms 131072 KB 

#include <bits/stdc++.h>

using namespace std;

typedef long double  ll;
#define endl "\n";

void setIO(string s) {
	freopen((s + ".in").c_str(), "r", stdin);
	freopen((s + ".out").c_str(), "w", stdout);
}
ll fun(vector<vector<ll>>&v,ll mid,ll L){
    vector<vector<ll>>a;
    // cout<<mid<<endl;
    for(auto it:v){
        if(mid<it[1])continue;
        ll l=it[0]-sqrtl(mid*mid-it[1]*it[1]),r=it[0]+sqrt(mid*mid-it[1]*it[1]);
        if(l<=L&&r>=0)
        a.push_back({l,r});

        // cout<<l<<" "<<r<<endl;
    }
    if(a.empty())return 1;
    // cout<<endl;
    // if()
    if(a[0][0]>0)return 1;
    ll num=a[0][1];
    for(int i=1;i<a.size();++i){
        auto it=a[i];
        if(it[0]>num)return 1;
        num=max(num,it[1]);
    }
    if(num<L)return 1;
    return 0;
}
    
int main()
{
    // setIO("angry");
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);cout.tie(NULL);
    
    ll n,L;
    cin>>n>>L;
    vector<vector<ll>>v;
    for(int i=0;i<n;++i){
        ll l,r;
        cin>>l>>r;
        v.push_back({l,r});
    }
    ll l=0,r=2e9,mid,ans=0;
    while(l<=r){
        mid=l+(r-l)/2;
        if(fun(v,mid,L)){
            l=mid+1e-5;
            ans=mid;
        }
        else{
            r=mid-1e-5;
        }
    }
    cout<<fixed<<setprecision(3)<<ans<<endl;
    
}

Compilation message

mobile.cpp: In function 'll fun(std::vector<std::vector<long double> >&, ll, ll)':
mobile.cpp:30:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<long double> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |     for(int i=1;i<a.size();++i){
      |                 ~^~~~~~~~~
mobile.cpp: In function 'void setIO(std::string)':
mobile.cpp:11:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |  freopen((s + ".in").c_str(), "r", stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
mobile.cpp:12:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |  freopen((s + ".out").c_str(), "w", stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 4.0

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

Subtask #2
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Incorrect 1 ms 340 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #3
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 12 ms 740 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 26 ms 1084 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 24 ms 1104 KB Output is correct
2 Correct 31 ms 1080 KB Output is correct
3 Incorrect 30 ms 1080 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #6
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 20 ms 1084 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 319 ms 11900 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 333 ms 12276 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 493 ms 13436 KB Output is correct
2 Incorrect 408 ms 12660 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #10
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 531 ms 14412 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #11
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 400 ms 14404 KB Output is correct
2 Incorrect 599 ms 14376 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #12
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1081 ms 70692 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 1087 ms 70788 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 1087 ms 93556 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 1092 ms 93772 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 1097 ms 105160 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 1062 ms 105124 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 1088 ms 113060 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 1093 ms 113036 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #20
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 546 ms 131072 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #21
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 657 ms 131072 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -