Submission #492704

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
492704	2021-12-08 13:04:29	zhougz	Discharging (NOI20_discharging)	C++17	100 / 100	138 ms	13928 KiB

Discharging

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/**
 *    author: chowgz
 *    created: 14/03/2021 11:20:55
**/
#include <bits/stdc++.h>
using namespace std;
constexpr int MAXN = (int)1e6;
struct Line {
  int m;
  long long c;
  long long operator()(int x) {
    return (long long)m * x + c;
  }
  double operator^(const Line &rhs) {
    return ((double)c - rhs.c) / ((double)rhs.m - m);
  }
};
struct ConvexHull {
  Line lines[MAXN + 1];
  int l = 0, r = 0;
  void operator+=(Line line) {
    while (r - l >= 2 && (line ^ lines[r - 1]) <= (lines[r - 1] ^ lines[r - 2])) {
      r--;
    }
    lines[r] = line;
    r++;
 
 
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Compilation message (stderr)

Discharging.cpp: In function 'int main()':
Discharging.cpp:18:11: warning: 'dp' may be used uninitialized in this function [-Wmaybe-uninitialized]
   18 |   return ((double)c - rhs.c) / ((double)rhs.m - m);
      |           ^~~~~~~~~
Discharging.cpp:50:12: note: 'dp' was declared here
   50 |  long long dp;
      |            ^~

• Subtask 1: 9 / 9
• Subtask 2: 13 / 13
• Subtask 3: 25 / 25
• Subtask 4: 11 / 11
• Subtask 5: 14 / 14
• Subtask 6: 28 / 28