Submission #1102467

#	Time	Username	Problem	Language	Result	Execution time	Memory
1102467		modwwe	Airplane (NOI23_airplane)	C++17	100 / 100	243 ms	19000 KiB

Main

#pragma GCC optimize("Ofast,unroll-loops")
//#pragma GCC optimize("conserve-stack")
#include<bits/stdc++.h>
//#define int long long
#define ll long long
#define down cout<<'\n';
#define debug cout<<" cucuucucuuu",down
#define NHP     ios_base::sync_with_stdio(0);cout.tie(0);cin.tie(0);
#define modwwe  int t;cin>>t; while(t--)
#define bit(i,j) (i>>j&1)
#define sobit(a) __builtin_popcountll(a)
#define task "test"
#define fin(x) freopen(x".inp","r",stdin)
#define fou(x) freopen(x".out","w",stdout)
#define pb push_back
#define mask(i) (1<<i)
#define checktime   cerr << (double)clock() / CLOCKS_PER_SEC * 1000  << " ms";
using namespace std;
#define getchar_unlocked getchar

inline int scan()
{
    char c = getchar_unlocked();
    int x = 0;
    while (c < '0' || c > '9')
    {
        c = getchar_unlocked();
    }
    while (c >= '0' && c <= '9')
    {
        x = (x << 1) + (x << 3) + c - '0';
        c = getchar_unlocked();
    }
    return x;
};
void phongbeo();
const int inf = 1e18;
const int mod2 = 1e9 + 7;
const int  mod1 = 998244353;
int add(int x,int y)
{
    if(x+y>=mod2) x-=mod2;
    return x+y;
}
struct icd
{
    long double a;
    int b;
};
struct ib
{
    int a;
    int b;
};
struct ic
{
    int a, b, c, d;
};
struct ie
{
    int a, b, c, d, e;

};

int n, m, s1, s2, s4, s3, sf, k, s5, s6, mx, s7, s8, s9, mx2, res, dem2 = 0, dem = 0, s33, dem3, dem4, mid, l2, r2, center;
int  i, s10, s12,k1,k2,k3,s11,limit,w,l,r,last,root;
int kk;
int el = 19;

main()
{
    if(fopen(task".inp","r"))
    {
        fin(task);
        fou(task);
    }
    NHP
    /// cin>>s1;
///modwwe
    phongbeo();
    // checktime
}
struct cmp{
 bool operator()(ib a,ib b)
  {
      return a.a>b.a;
  }
};
int dist1[200001];
int distn[200001];
int a[200001];
vector<int> v[200001];
 priority_queue<ib,vector<ib>,cmp>p ;
void dis(int gg,int c[])
 {
    p.push({0,gg});
     while(!p.empty())
     {
         ib x=p.top();
        p.pop();
          if(c[x.b]!=-1) continue;
          c[x.b]=max(a[x.b],x.a);
           for(auto f:v[x.b])
               if(c[f]==-1)
                   p.push({c[x.b]+1,f});
     }
 }
void phongbeo()
{
 cin>>n>>m;
  for(int i=1;i<=n;i++)
     cin>>a[i];
   for(int i=1;i<=m;i++)
 cin>>l>>r,v[l].pb(r),v[r].pb(l);
 memset(dist1,-1,sizeof dist1);
 memset(distn,-1,sizeof distn);
 dis(1,dist1);
  dis(n,distn);
  s4=inf;
  for(int i=1;i<=n;i++)
  {
       s4=min(s4,max(dist1[i],distn[i])*2);
       for(auto f:v[i])
        s4=min(s4,max(dist1[i],distn[f])*2+1);
  }
  cout<<s4;
}

Compilation message (stderr)

Main.cpp:37:17: warning: overflow in conversion from 'double' to 'int' changes value from '1.0e+18' to '2147483647' [-Woverflow]
   37 | const int inf = 1e18;
      |                 ^~~~
Main.cpp:70:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   70 | main()
      | ^~~~
Main.cpp: In function 'int main()':
Main.cpp:13:23: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 | #define fin(x) freopen(x".inp","r",stdin)
      |                ~~~~~~~^~~~~~~~~~~~~~~~~~~
Main.cpp:74:9: note: in expansion of macro 'fin'
   74 |         fin(task);
      |         ^~~
Main.cpp:14:23: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 | #define fou(x) freopen(x".out","w",stdout)
      |                ~~~~~~~^~~~~~~~~~~~~~~~~~~~
Main.cpp:75:9: note: in expansion of macro 'fou'
   75 |         fou(task);
      |         ^~~

• Subtask 1: 22 / 22
• Subtask 2: 10 / 10
• Subtask 3: 31 / 31
• Subtask 4: 37 / 37