Submission #1113241

#	Time	Username	Problem	Language	Result	Execution time	Memory
1113241		ntdaccode	Real Mountains (CCO23_day1problem2)	C++17	0 / 25	2 ms	336 KiB

Main

#include<bits/stdc++.h>
#define fori(i,a,b) for(int i = a;i <= b; i++)
#define int long long
#define pb push_back
using namespace std;

typedef pair<int,int> ii;
typedef tuple<int,int,int> tp;

const int M = 1e6 + 10;
const int N = 5e3 + 10;
const int mod = 1e9 + 7;

int n,h[N];
int target[N];
vector<int> Q[N];
int32_t main()
{
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  if(fopen("1.inp","r"))
  {
    freopen("1.inp","r",stdin);
    freopen("1.out","w",stdout);
  }
  #define task ""
  if(fopen(task".inp","r"))
  {
    freopen(task".inp","r",stdin);
    freopen(task".out","w",stdout);
  }
  cin >> n;
  for(int i = 1;i <= n; i++) cin >> h[i];

  int suf = 0,pre = 0;
  for(int i = 1;i <= n; i++) {
    pre = max(pre, h[i]);
    target[i] =  pre ;
  }
  for(int i = n; i != 0; i--) {
    suf = max(suf, h[i]);
    target[i] = min(target[i], suf);
  }
  //for(int i = 1;i <= n; i++) cout << target[i] << " ";
  for(int i = 1;i <= n; i++) {
    if(h[i] != target[i]) {
      Q[h[i]].pb(i);
    }
  }
  int kq = 0;
  for(int i = 1;i <= 100; i++) {
    if(Q[i].size() == 0) continue;
    if(Q[i].size() == 1) {
      int x = 1e9 , y = 1e9 , cur = Q[i][0];
      for(int j = 1; j < cur; j++) {
        if(h[j] > h[cur]) x = min(x,h[j]);
      }
      for(int j = cur + 1; j !=n ;j++) {
        if(h[j] > h[cur]) y = min(y,h[j]);
      }
      kq += x + y + i;
      h[cur]++;
      if(h[cur] != target[cur]) Q[h[cur]].pb(cur);

    }
    else {
      sort(Q[i].begin(),Q[i].end());
      int pre_l = 1e9 , pre_r = 1e9 , suf_l = 1e9 , suf_r = 1e9;
      int l = Q[i][0], r = Q[i].back();
      for(int j = 1;j < l ; j++) {
        if(h[j] > h[l]) pre_l = min(pre_l,h[j]);
      }
      for(int j = l + 1;j <= n; j++) {
        if(h[j] > h[l]) suf_l = min(suf_l,h[j]);
      }
      for(int j = 1; j < r; j++) {
        if(h[j] > h[r]) pre_r = min(pre_r,h[j]);
      }
      for(int j = r + 1;j <= n; j++) {
        if(h[j] > h[r]) suf_r = min(suf_r,h[j]);
      }
      //cout << i << " " << h[6] << "\n";
    //cout << pre_l << " " << suf_l << " " << pre_r << " " << suf_r << "\n";
      kq += min(pre_l + suf_l + h[l] + h[r] + h[l] + 1 + suf_r,
                pre_r + suf_r + h[r] + h[l] + h[r] + 1 + pre_l);
      int sz = Q[i].size();
      kq += (sz - 2) * (i + 2 * (i + 1));
      for(int idx : Q[i]) {
          h[idx]++;
          if(h[idx] != target[idx]) Q[h[idx]].pb(idx);
      }
    }
  }
  cout << kq;
}

Compilation message (stderr)

Main.cpp: In function 'int32_t main()':
Main.cpp:24:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 |     freopen("1.inp","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~
Main.cpp:25:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   25 |     freopen("1.out","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~
Main.cpp:30:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |     freopen(task".inp","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
Main.cpp:31:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   31 |     freopen(task".out","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 3
• Subtask 2: 0 / 3
• Subtask 3: 0 / 3
• Subtask 4: 0 / 3
• Subtask 5: 0 / 4
• Subtask 6: 0 / 5
• Subtask 7: 0 / 4