| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 1047119 |
2024-08-07T09:05:12 Z |
Requiem |
Balloons (CEOI11_bal) |
C++17 |
|
22 ms |
7104 KB |
#include<bits/stdc++.h>
#define int long long
#define pb push_back
#define fast ios_base::sync_with_stdio(false), cin.tie(nullptr), cout.tie(nullptr);
#define MOD 1000000007
#define inf 1e18
#define fi first
#define se second
#define FOR(i,a,b) for(int i=a;i<=b;i++)
#define FORD(i,a,b) for(int i=a;i>=b;i--)
#define sz(a) ((int)(a).size())
#define endl '\n'
#define pi 3.14159265359
#define TASKNAME ""
using namespace std;
/**Debugging Tool **/
void __print(int x) {cerr << x;}
void __print(unsigned x) {cerr << x;}
void __print(unsigned long x) {cerr << x;}
void __print(unsigned long long x) {cerr << x;}
void __print(float x) {cerr << x;}
void __print(double x) {cerr << x;}
void __print(long double x) {cerr << x;}
void __print(char x) {cerr << '\'' << x << '\'';}
void __print(const char *x) {cerr << '\"' << x << '\"';}
void __print(const string &x) {cerr << '\"' << x << '\"';}
void __print(bool x) {cerr << (x ? "true" : "false");}
template<typename T, typename V>
void __print(const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ','; __print(x.second); cerr << '}';}
template<typename T>
void __print(const T &x) {int f = 0; cerr << '{'; for (auto &i: x) cerr << (f++ ? "," : ""), __print(i); cerr << "}";}
void _print() {cerr << "]\n";}
template <typename T, typename... V>
void _print(T t, V... v) {__print(t); if (sizeof...(v)) cerr << ", "; _print(v...);}
#ifndef ONLINE_JUDGE
#define debug(x...) cerr << "[" << #x << "] = ["; _print(x)
#else
#define debug(x...)
#endif
/*----------------------------------*/
/** Vector nhieu chieu **/
template<int D, typename T>
struct Vec: public vector<Vec<D - 1, T>>{
static_assert(D >= 1, "vector dimensions must be greater than 0");
template<typename... Args>
Vec(int n = 0, Args... args): vector<Vec<D - 1, T>>(n, Vec<D - 1, T>(args...)){
}
};
template<typename T>
struct Vec<1, T>: public vector<T> {
Vec(int n = 0, const T& val = T()): vector<T>(n, val) {};
};
/*--------------------------------*/
template<typename T> bool maximize(T &res, const T &val) { if (res < val){ res = val; return true; }; return false; }
template<typename T> bool minimize(T &res, const T &val) { if (res > val){ res = val; return true; }; return false; }
typedef pair<int,int> ii;
typedef pair<int,ii> iii;
typedef vector<int> vi;
#define eps 1e-4
/**
* Cho n quả bóng với 2 thông số là Xi và Ri, tương ứng là vị trí bơm và bán kính bơm tối đa.
* Ta bơm tuần tự từ quả bóng thứ 1 đến quả bóng thứ n.
* Với quả bóng thứ i, ta bơm cho đến khi nó chạm vào quả bóng khác hoặc nó đạt bán kính tối đa
* Giả sử ta đang có cấu hình là (x1, r1), (x2, r2), ... Khi thêm vào (xn, rn) thì bài toán
sẽ thay đổi ntn
*
*/
const int MAXN = 3e5 + 9;
struct balloon{
int position;
int maxDiameter;
} B[MAXN];
int n;
void input(){
cin >> n;
for(int i = 1; i <= n; i++){
cin >> B[i].position >> B[i].maxDiameter;
}
}
namespace subtask1{
bool check(){
return n <= 2000;
}
double currentDiameter[MAXN];
void solve(){
for(int i = 1; i <= n; i++){
if (i == 1) currentDiameter[i] = B[i].maxDiameter;
else{
currentDiameter[i] = B[i].maxDiameter;
for(int j = 1; j < i; j++){
int x1 = B[j].position;
int x2 = B[i].position;
minimize(currentDiameter[i], 1.0 * (x1 - x2) * (x1 - x2) / (4 * currentDiameter[j]));
}
}
cout << setprecision(3) << fixed << currentDiameter[i] << endl;
}
cout << endl;
}
}
main()
{
fast;
if (fopen(TASKNAME".inp","r")){
freopen(TASKNAME".inp","r",stdin);
freopen(TASKNAME".out","w",stdout);
}
input();
if (subtask1::check()) return subtask1::solve(), 0;
}
/**
Warning:
- MLE / TLE?
- Gioi han mang?
- Gia tri max phai luon gan cho -INF
- long long co can thiet khong?
- tran mang.
- code can than hon
- Nho sinh test de tranh RTE / TLE
--> Coi lai truoc khi nop
**/
Compilation message
bal.cpp:117:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
117 | main()
| ^~~~
bal.cpp: In function 'int main()':
bal.cpp:121:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
121 | freopen(TASKNAME".inp","r",stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
bal.cpp:122:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
122 | freopen(TASKNAME".out","w",stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
2392 KB |
10 numbers |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
2396 KB |
2 numbers |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
2520 KB |
505 numbers |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
4 ms |
2544 KB |
2000 numbers |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
2 ms |
2652 KB |
Unexpected end of file - double expected |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
5 ms |
3164 KB |
Unexpected end of file - double expected |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
11 ms |
3912 KB |
Unexpected end of file - double expected |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
14 ms |
4036 KB |
Unexpected end of file - double expected |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
18 ms |
6592 KB |
Unexpected end of file - double expected |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
22 ms |
7104 KB |
Unexpected end of file - double expected |
| 2 |
Halted |
0 ms |
0 KB |
- |
