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Submission #356806

# Submission time Handle Problem Language Result Execution time Memory
356806 2021-01-23T17:40:51 Z jnk Balloons (CEOI11_bal) C++17
40 / 100
 2000 ms 4416 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

double x[200005], r[200005], res[200005];

int main(){
    
    cout.sync_with_stdio(0);
    cin.tie(0);

    int n; cin >> n;
    for(int i = 0; i < n; i++)
        cin >> x[i] >> r[i];
    

    res[0] = r[0];
    stack<pair<double,double>> st;
    st.push(make_pair(x[0], res[0]));

    for(int i = 1; i < n; i++){
        double esq = 0, dir = r[i];
        for(int j = 0; j < 50; j++){
            double r = (esq + dir)/2;
            int ok = 1;
            vector<pair<double,double>> safe;
            while(!st.empty()){
                auto p = st.top();
                double xdif = x[i] - p.first;
                double ydif = r - p.second;
                double dist = r+p.second;

                if(xdif*xdif + ydif*ydif < dist*dist)
                    ok = 0;
                if(r > p.second) st.pop(), safe.push_back(p);
                else break;
            }

            if(ok) esq = r;
            else dir = r;
            reverse(safe.begin(), safe.end());
            for(auto par : safe)
                st.push(par);
        }
        res[i] = esq;
        st.push(make_pair(x[i], res[i]));
    }

    for(int i = 0; i < n; i++)
        printf("%.3f\n", res[i]);

	return 0;
}

Compilation message

bal.cpp: In function 'int main()':
bal.cpp:49:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   49 |     for(int i = 0; i < n; i++)
      |     ^~~
bal.cpp:52:2: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   52 |  return 0;
      |  ^~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB 10 numbers

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB 2 numbers

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 364 KB 505 numbers

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 51 ms 640 KB 2000 numbers

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2060 ms 1920 KB Time limit exceeded

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2062 ms 2800 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2048 ms 3376 KB Time limit exceeded

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2078 ms 3604 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2027 ms 4276 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2088 ms 4416 KB Time limit exceeded
2 Halted 0 ms 0 KB -