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Submission #788961

# Submission time Handle Problem Language Result Execution time Memory
788961 2023-07-20T18:34:01 Z Metal_Sonic Balloons (CEOI11_bal) C++17
10 / 100
 173 ms 5660 KB 
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define sz(x) (x).size()
#define all(x) x.begin() , x.end()
#define double long double
void Sonic(string name = "") {
    ios_base::sync_with_stdio(false); cin.tie(nullptr);
    if(sz(name)){
        freopen((name+".in").c_str(), "r", stdin);
        freopen((name+".out").c_str(), "w", stdout);
    }
}
int xd[] = {0, 1, -1, 0, 1, 1, -1, -1};
int yd[] = {1, 0, 0, -1, 1, -1, 1, -1};
const int mod = 1e9 + 7, MAXN = 1e5 + 5;
double calc(double x1, double x2, double r1){
    return (x2-x1)*(x2-x1)/(4*r1);
}
void run_test_case(){
    int n;cin>>n;
    stack<pair<double,double>>ballons;
    vector<double>ans(n);
    for(int i = 0; i < n; i++){
        double x,r;cin>>x>>r;
        double max_r = r;
        while(!ballons.empty()){
            pair<double,double>last = ballons.top();
            double cur_r = calc(x,last.first,last.second);
            max_r = min(max_r,cur_r);
            if(max_r >= cur_r){ballons.pop();continue;}
            else break;
        }
        ans[i] = max_r;
        ballons.push({x,r});
    }
    for(auto &it : ans)cout<<fixed<<setprecision(3)<<it<<'\n';
}
int main(){
    Sonic();
    int T = 1;
    //cin>>T;
    while(T--){
        run_test_case();
    }
    return 0;
}

Compilation message

bal.cpp: In function 'void Sonic(std::string)':
bal.cpp:10:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |         freopen((name+".in").c_str(), "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
bal.cpp:11:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |         freopen((name+".out").c_str(), "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 212 KB 5th numbers differ - expected: '17.1630000000', found: '4.3710000000', error = '12.7920000000'
2 Halted 0 ms 0 KB -

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB 2 numbers

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 340 KB 3rd numbers differ - expected: '0.0420000000', found: '2.0830000000', error = '2.0410000000'
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 340 KB 3rd numbers differ - expected: '121.0000000000', found: '120.0180000000', error = '0.9820000000'
2 Halted 0 ms 0 KB -

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 18 ms 776 KB 3rd numbers differ - expected: '211.0000000000', found: '210.0110000000', error = '0.9890000000'
2 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 39 ms 1696 KB 3rd numbers differ - expected: '15396.0000000000', found: '9489.3930000000', error = '5906.6070000000'
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 83 ms 3052 KB 3rd numbers differ - expected: '7936.0000000000', found: '6084.6240000000', error = '1851.3760000000'
2 Halted 0 ms 0 KB -

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 92 ms 3496 KB 6th numbers differ - expected: '5053.0000000000', found: '5052.0000000000', error = '1.0000000000'
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 132 ms 4544 KB 3rd numbers differ - expected: '1872.0000000000', found: '1871.0010000000', error = '0.9990000000'
2 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 173 ms 5660 KB 3rd numbers differ - expected: '2960.0000000000', found: '2959.0010000000', error = '0.9990000000'
2 Halted 0 ms 0 KB -