Submission #287941

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
287941	2020-09-01 07:06:09	Plurm	Discharging (NOI20_discharging)	C++11	20 / 100	169 ms	4344 KiB

Discharging

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#include <bits/stdc++.h>
using namespace std;
int n;
int h[1000005];
set<int> active;
class state{
public:
  int i, j; // join(i,j); (i < j)
  long long diff;
  state(int x, int y, long long d) : i(x), j(y), diff(d) {}
  friend bool operator<(const state& x, const state& y){
    return x.diff > y.diff;
  }
};
long long computeDiff(int i, int j){
  assert(i < j);
  return -1ll*(n-j+1)*h[j] -1ll*(n-i+1)*h[i] + 1ll*(n-i+1)*h[j];
}
bool verifyDiff(state cur){
  int i = cur.i;
  int j = cur.j;
  long long diff = cur.diff;
  return active.count(i) && active.count(j) && computeDiff(i,j) == diff;
}
int main(){
  scanf("%d",&n);
  long long ans = 0ll;
  int mx = 0;
  vector<int> pivots;
  for(int i = 1; i <= n; i++){
 
 
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Compilation message (stderr)

Discharging.cpp: In function 'int main()':
Discharging.cpp:39:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |  for(int i = 0; i < pivots.size()-1; i++){
      |                 ~~^~~~~~~~~~~~~~~~~
Discharging.cpp:26:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   26 |  scanf("%d",&n);
      |  ~~~~~^~~~~~~~~
Discharging.cpp:31:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   31 |   scanf("%d",h+i);
      |   ~~~~~^~~~~~~~~~

• Subtask 1: 9 / 9
• Subtask 2: 0 / 13
• Subtask 3: 0 / 25
• Subtask 4: 11 / 11
• Subtask 5: 0 / 14
• Subtask 6: 0 / 28