Submission #1105329

#	Time	Username	Problem	Language	Result	Execution time	Memory
1105329		modwwe	Hotspot (NOI17_hotspot)	C++17	9 / 100	4 ms	764 KiB

hotspot

#pragma GCC optimize("Ofast,unroll-loops")
//#pragma GCC target("avx,avx2,sse,sse2")
#include<bits/stdc++.h>
#define int short
#define ll long long
#define down cout<<'\n';
#define debug cout<<" cdasdcda\n";
#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;
const int inf=1e9;
void phongbeo();
const int mod2=1e9+7;
const int  mod1=998244353;
struct icd
{
    int a,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,f;

};
ll n,m,s1,s2,s4,s3,sf,k,r,mid,s5,s6,mx,s7,s8,s9,mx2,res,dem2=0,dem=0,l;
int  i,s10,s12;
int el=29;
main()
{
    if(fopen(task".inp","r"))
    {
        fin(task);
        fou(task);
    }
    NHP
    /// cin>>s1;
    // modwwe
    phongbeo(),down
    /// checktime
}
long double cost[5001];
deque<ib> p;
long double ff;
vector<int> v[5001];
ib c[5001];
ib d[5001];
void bfs(int x,ib c[])
{
    c[x]= {0,1};
    p.push_back({0,x});
    while(!p.empty())
    {
        ib x=p.front();
        p.pop_front();
        for(auto f:v[x.b])
            if(c[f].a==-1)c[f]= {x.a+1,c[x.b].b},p.push_back({x.a+1,f});
            else if(c[f].a==c[x.b].a+1)c[f].b+=c[x.b].b;
    }
}
void phongbeo()
{
    cin>>n>>m;
    for(int i=1; i<=m; i++)
        cin>>l>>r,v[l].pb(r),
            v[r].pb(l);
             cin>>k;
              for(int i=1;i<=k;i++)
              {
                  cin>>l>>r;
                  for(int i=1;i<=n;i++)
                  c[i]={-1,-1},d[i]={-1,-1};
                   bfs(l,c);
                   bfs(r,d);
                   for(int i=1;i<=n;i++)
                    if(d[l].a==c[i].a+d[i].a)
                   cost[i]+=(c[i].b*d[i].b)/c[l].b;
              }
              s2=0;
              for(int i=1;i<=n;i++){
               if(cost[i]>ff)
                s2=i,ff=cost[i];
                }
                cout<<s2;
}

Compilation message (stderr)

hotspot.cpp:18:15: warning: overflow in conversion from 'double' to 'short int' changes value from '1.0e+9' to '32767' [-Woverflow]
   18 | const int inf=1e9;
      |               ^~~
hotspot.cpp:20:19: warning: overflow in conversion from 'double' to 'short int' changes value from '1.000000007e+9' to '32767' [-Woverflow]
   20 | const int mod2=1e9+7;
      |                ~~~^~
hotspot.cpp:21:17: warning: overflow in conversion from 'int' to 'short int' changes value from '998244353' to '1' [-Woverflow]
   21 | const int  mod1=998244353;
      |                 ^~~~~~~~~
hotspot.cpp:47:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   47 | main()
      | ^~~~
hotspot.cpp: In function 'void bfs(short int, ib*)':
hotspot.cpp:75:37: warning: narrowing conversion of '(((int)x.ib::a) + 1)' from 'int' to 'short int' [-Wnarrowing]
   75 |             if(c[f].a==-1)c[f]= {x.a+1,c[x.b].b},p.push_back({x.a+1,f});
      |                                  ~~~^~
hotspot.cpp:75:66: warning: narrowing conversion of '(((int)x.ib::a) + 1)' from 'int' to 'short int' [-Wnarrowing]
   75 |             if(c[f].a==-1)c[f]= {x.a+1,c[x.b].b},p.push_back({x.a+1,f});
      |                                                               ~~~^~
hotspot.cpp: In function 'int main()':
hotspot.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)
      |                ~~~~~~~^~~~~~~~~~~~~~~~~~~
hotspot.cpp:51:9: note: in expansion of macro 'fin'
   51 |         fin(task);
      |         ^~~
hotspot.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)
      |                ~~~~~~~^~~~~~~~~~~~~~~~~~~~
hotspot.cpp:52:9: note: in expansion of macro 'fou'
   52 |         fou(task);
      |         ^~~

• Subtask 1: 4 / 4
• Subtask 2: 5 / 5
• Subtask 3: 0 / 11
• Subtask 4: 0 / 18
• Subtask 5: 0 / 26
• Subtask 6: 0 / 36