oj.uz

Submission #917151

# Submission time Handle Problem Language Result Execution time Memory
917151 2024-01-27T10:23:14 Z FucKanh Balloons (CEOI11_bal) C++14
100 / 100
 126 ms 8588 KB 
#include<bits/stdc++.h>
using namespace std;

void IOfile(string name) {
    freopen((name + ".inp").c_str(), "r", stdin);
    freopen((name + ".out").c_str(), "w", stdout);
}

pair<double,double> a[200005];
stack<int> st;

double findr(pair<int, double> a, double bx) {
    return (a.first - bx) * (a.first - bx) / (4 * a.second);
}

int main() {
    ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
//    IOfile("TEST");
    int n; cin >> n;
    for (int i =0 ; i <n;i++) {
        int x,r;
        cin >> x >> r;
        a[i] = {x,r};
    }

    st.push(0);
    for (int i = 1;  i < n; i++) {
        while (st.size()) {
            a[i].second=min(a[i].second, findr(a[st.top()], a[i].first));
            if (a[st.top()].second <= a[i].second) {
                st.pop();
            }
            else break;
        }
        st.push(i);
    }
    for (int i = 0; i < n; i++) cout << fixed << setprecision(3) << a[i].second << "\n";
    return 0;
}

Compilation message

bal.cpp: In function 'void IOfile(std::string)':
bal.cpp:5:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    5 |     freopen((name + ".inp").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
bal.cpp:6:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    6 |     freopen((name + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB 10 numbers

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB 2 numbers

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB 505 numbers

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 344 KB 2000 numbers

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 2908 KB 20000 numbers

Subtask #6
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 30 ms 3652 KB 50000 numbers
2 Correct 25 ms 3928 KB 49912 numbers

Subtask #7
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 57 ms 4992 KB 100000 numbers

Subtask #8
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 72 ms 5424 KB 115362 numbers
2 Correct 60 ms 5548 KB 119971 numbers

Subtask #9
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 89 ms 6484 KB 154271 numbers
2 Correct 97 ms 8588 KB 200000 numbers

Subtask #10
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 126 ms 7912 KB 200000 numbers
2 Correct 111 ms 8540 KB 199945 numbers