Submission #1094470

#	Time	Username	Problem	Language	Result	Execution time	Memory
1094470		modwwe	Port Facility (JOI17_port_facility)	C++17	10 / 100	8 ms	860 KiB

port_facility

#pragma GCC optimize("Ofast,unroll-loops")
#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 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 = 1e17;
const int mod2 = 1e9 + 9;
const int  mod1 = 998244353;
struct icd
{
    long double a;
    int b;
};
struct ib
{
    int a;
    int b;
};
struct ic
{
    int a, b, c;
};
struct id
{
    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, l, r, mid, l2, r2, center;
int  i, s10, s12,k1,k2,s11;
int kk;
int el = 19;
main()
{
    if(fopen(task".inp","r"))
    {
        fin(task);
        fou(task);
    }
    NHP
    /// cin>>s1;
///modwwe
    phongbeo();
    // checktime
}
vector<int> v[2001];
ib a[2001];
int c[2001];
bool cmp(ib a,ib b)
{
    return a.a<b.a;
}
void dfs(int x)
 {
     for(auto f:v[x])
     {
          if(c[f]==c[x]){cout<<0; exit(0);}
         if(!c[f]){
        c[f]=3-c[x];
        dfs(f);
        }
     }
 }
void phongbeo()
{
     cin>>n;
     for(int i=1;i<=n;i++)
         cin>>a[i].a>>a[i].b;
 for(int i=1;i<n;i++)
  for(int j=i+1;j<=n;j++){
  if(a[i].a>a[j].b||a[j].a>a[i].b)
     continue;
     if(a[i].a>=a[j].a&&a[i].b<=a[j].b) continue;
     if(a[j].a>=a[i].a&&a[j].b<=a[i].b) continue;
     v[i].pb(j);
     v[j].pb(i);
     }
     s4=1;
     for(int i=1;i<=n;i++)
     if(!c[i])
     {
         c[i]=1;
         s4=(s4<<1);
         if(s4>=mod2)s4-=mod2;
         dfs(i);
     }
     cout<<s4;
}

Compilation message (stderr)

port_facility.cpp:67:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   67 | main()
      | ^~~~
port_facility.cpp: In function 'void phongbeo()':
port_facility.cpp:105:3: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
  105 |   if(a[i].a>a[j].b||a[j].a>a[i].b)
      |   ^~
port_facility.cpp:107:6: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
  107 |      if(a[i].a>=a[j].a&&a[i].b<=a[j].b) continue;
      |      ^~
port_facility.cpp: In function 'int main()':
port_facility.cpp:12:23: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 | #define fin(x) freopen(x".inp","r",stdin)
      |                ~~~~~~~^~~~~~~~~~~~~~~~~~~
port_facility.cpp:71:9: note: in expansion of macro 'fin'
   71 |         fin(task);
      |         ^~~
port_facility.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 fou(x) freopen(x".out","w",stdout)
      |                ~~~~~~~^~~~~~~~~~~~~~~~~~~~
port_facility.cpp:72:9: note: in expansion of macro 'fou'
   72 |         fou(task);
      |         ^~~

• Subtask 1: 10 / 10
• Subtask 2: 0 / 12
• Subtask 3: 0 / 56
• Subtask 4: 0 / 22