Submission #1274750

#	Time	Username	Problem	Language	Result	Execution time	Memory
1274750		sasde	Flooding Wall (BOI24_wall)	C++20	70 / 100	5089 ms	16220 KiB

Main

#include<bits/stdc++.h>
using namespace std;
bool M1;
#define PI 3.14159265358979323846
#define sz(a) (int)a.size()
#define all(x) x.begin(),x.end()
#define ii pair<int,int>
#define iii pair<int,ii>
#define iv pair<ii,ii>
#define se second
#define fi first
#define ffi fi.fi
#define sfi se.fi
#define sse se.se
#define fse fi.se
#define lt(i, c, d) for(int i = c; i <= d; ++i)
#define fl(i, c, d) for(int i = d; i >= c; --i)
#define pb push_back
#define emb emplace_back
#define emf emplace_front
#define em emplace
#define look_memory cerr<<abs(&M2-&M1)/1024.0/1024<<'\n'
#define look_time   cerr << "TIME : " << clock() * 0.001 << "s" <<'\n'
const int N=1e6+5,lg=30,mod=1e9+7;
mt19937 rd(chrono::steady_clock::now().time_since_epoch().count());
int Rand(int u,int v){
 return u+rd()%(v-u+1);
}
int dx[]={1,0,-1,0,1,1,-1,-1};
int dy[]={0,-1,0,1,1,-1,1,-1};
int node,a[N],b[N],ans,po[N],w[N],pre[N],suf[N];
vector<int>nen;
int tru(int u,int v){
  u-=v;
  if(u<0)u+=mod;
  return u;
}
int ne(int u){
  return lower_bound(all(nen),u)-nen.begin()+1;
}
bool M2;
void solve(){
  cin >> node;
  po[0]=1;
  nen.emb(0);
  for(int i=1;i<=node;++i){
    cin >> a[i];
    nen.emb(a[i]);
    po[i]=2LL*po[i-1]%mod;
  }
  for(int i=1;i<=node;++i){
    cin >> b[i];
    nen.emb(b[i]);
  }
  sort(all(nen));
  nen.erase(unique(all(nen)),nen.end());
  int n=sz(nen);
  pre[0]=suf[node+1]=1;
  for(int i=1;i<n;++i){
      for(int j=1;j<=node;++j){
        w[j]=(nen[i]>a[j])+(nen[i]>b[j]);
        pre[j]=1LL*pre[j-1]*w[j]%mod;
      }
      for(int j=node;j>=1;--j){
        suf[j]=1LL*suf[j+1]*w[j]%mod;
      }
      int val=0;
      for(int j=2;j<node;++j){
        val=(val+1LL*w[j]*tru(po[j-1],pre[j-1])%mod*tru(po[node-j],suf[j+1])%mod)%mod;
        // cout <<w[j]<<" "<<po[j-1]<<" "<<pre[j-1]<<" "<<po[node-j]<<" "<<suf[j+1]<<'\n';
      }
      ans=(ans+1LL*val*tru(nen[i],nen[i-1])%mod)%mod;

  }
  cout << ans;
}
main()
{
  srand(time(0));
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    #define task "aws"
    if(fopen(task".inp","r")){
      freopen(task".inp","r",stdin);
      freopen(task".out","w",stdout);
    }
    int t=1;
 //   cin >> t;
while(t--){
    solve();cout<<'\n';
}
look_memory;
look_time;
}

Compilation message (stderr)

Main.cpp:77:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   77 | main()
      | ^~~~
Main.cpp: In function 'int main()':
Main.cpp:85:14: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   85 |       freopen(task".inp","r",stdin);
      |       ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
Main.cpp:86:14: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   86 |       freopen(task".out","w",stdout);
      |       ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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