Submission #1107004

#	Time	Username	Problem	Language	Result	Execution time	Memory
1107004		vjudge1	Flooding Wall (BOI24_wall)	C++17	8 / 100	129 ms	6864 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=1e3+10;
const int mod=1e9+7;
int n,a[M],b[M];
int x[M],y[M],kq=0;
void ktra()
{
  fori(i,1,n) y[i]=1e9;
  int l=0,r=0;
  fori(i,1,n) {
    l=max(l,x[i]);
    y[i]=min(y[i],l);
  }
  for(int i=n;i!=0;i--) {
    r=max(r,x[i]);
    y[i]=min(y[i],r);
  }
  fori(i,1,n) kq=(kq+max(0ll,y[i]-x[i]))%mod;
}
void duyet(int i)
{
  if(i==n+1) ktra();
  else {
    fori(j,0,1) {
      if(j) x[i]=a[i];
      else x[i]=b[i];
      duyet(i+1);
    }
  }
}
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;
  fori(i,1,n) cin >> a[i];
  fori(i,1,n) cin >> b[i];
  if(n<=20) {
    duyet(1);
    cout << kq ;
  }
}

Compilation message (stderr)

Main.cpp: In function 'int32_t main()':
Main.cpp:46:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   46 |     freopen("1.inp","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~
Main.cpp:47:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   47 |     freopen("1.out","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~
Main.cpp:52:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   52 |     freopen(task".inp","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
Main.cpp:53:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   53 |     freopen(task".out","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 8 / 8
• Subtask 2: 0 / 17
• Subtask 3: 0 / 19
• Subtask 4: 0 / 14
• Subtask 5: 0 / 12
• Subtask 6: 0 / 30