Submission #46340

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
46340	2018-04-19 13:27:57	RezwanArefin01	Building Bridges (CEOI17_building)	C++17	100 / 100	167 ms	18004 KiB

building

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int, int> ii; 
const int maxn = 1e5 + 10; 
const ll isQuery = -(1ll << 62);
struct line {
  ll m, b;
  mutable function<const line*()> succ; 
  bool operator < (const line &l) const {
    if(l.b != isQuery) return m < l.m; 
    const line* s = succ(); 
    if(!s) return 0;
    return b - s -> b < (s -> m - m) * l.m;
  } 
};
struct cht : public multiset<line> {
  bool bad(iterator y) {
    auto z = next(y);
    if(y == begin()) {
      if(z == end()) return 0; 
      return y -> m == z -> m && y -> b <= z -> b;
    }
    auto x = prev(y);
    if(z == end()) return y -> m == x -> m && y -> b <= x -> b;
    return 1.0 * (z -> b - x -> b) * (x -> m - y -> m) <= 1.0 * (y -> b - x -> b) * (x -> m - z -> m);
  }
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Compilation message (stderr)

building.cpp: In function 'int main(int, const char**)':
building.cpp:47:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  int n; scanf("%d", &n); 
         ~~~~~^~~~~~~~~~
building.cpp:49:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &h[i]);
   ~~~~~^~~~~~~~~~~~~
building.cpp:51:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &w[i]), sum += w[i]; 
   ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~

• Subtask 1: 30 / 30
• Subtask 2: 30 / 30
• Subtask 3: 40 / 40