/*
We found Despacito 5 during contest (not clickbait)
*/
#include <iostream>
#include <cstdio>
#include <vector>
#include <set>
#include <map>
#include <queue>
#include <stack>
#include <algorithm>
#include <cstring>
#include <cfloat>
#include <cmath>
#include <cassert>
#include <locale>
#include <string>
#include <bitset>
#include <functional>
#include <climits>
#include <iomanip>
using namespace std;
#define read(x) freopen(x,"r",stdin)
#define write(x) freopen(x,"w",stdout)
#define cl(a,b) memset(a,b,sizeof(a))
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define ll long long
#define ld long double
#define vec vector
#define vi vec<int>
#define heap priority_queue
#define res reserve
#define pb push_back
#define f(x,y,z) for(int x=(y); x<(z); x++)
#define fd(x,y,z) for(int x=(y); x>=(z); x--)
#define fit(x,y) for(auto x: y)
#define srt(x) sort(all(x))
#define rsrt(x) sort(rall(x))
#define make_unique(x) sort(all((x))); (x).resize(unique(all((x))) - (x).begin())
#define pii pair<int,int>
#define ppi pair<pii,int>
#define pip pair<int,pii>
#define mp make_pair
#define f1 first
#define s2 second
#define cdbg(x) cerr<<#x<<" = "<<x<<",\t";
#define cdbl cerr<<"\n----------\n";
#define pow2(x) ((x)*(x))
#define edist(x1, y1, x2, y2) (sqrt((pow2(x1-x2)+pow2(y1-y2))))
#define mdist(x1, y1, x2, y2) (abs((x1)-(x2))+abs((y1)-(y2)))
#define y1 FullSensei
#define mid ((ss+se)>>1)
#define left (si<<1)
#define right ((si<<1)+1)
#define pi 3.141592653589793
#define popcount __builtin_popcount
#define spc ' '
#define endl '\n'
#define in insert
#define up_b upper_bound
#define low_b lower_bound
#define Decimal fixed<<setprecision(20)
bool checkbit(int x,int y){return (x&(1<<y));}
int setbit(int x,int y){return (x^(1<<y));}
const int dirs[4][2]={{1,0},{0,1},{-1,0},{0,-1}};
const int mod=1e9+7;
const int p1=805306457;
const int p2=1610612741;
const int INF=1e9;
const int N=5e3;
int d[N+3][N+3];
int c[N+3][N+3];
int n;
int main(){
scanf("%d",&n);
assert(n<=N);
f(i,1,n+1) f(j,1,n+1){
c[i][j]=1;
d[i][j]=INF;
}
f(i,1,n+1) d[i][i]=c[i][i]=0;
f(i,0,n){
int u, v;
scanf("%d %d",&u,&v);
d[u][v]=1;
d[v][u]=1;
}
f(k,1,n+1){
f(i,1,n+1){
f(j,1,n+1){
if(k==i || k==j || i==j)
continue;
if(d[i][j] > d[i][k] + d[k][j]){
d[i][j]=d[i][k]+d[k][j];
c[i][j]=c[i][k]*c[k][j];
}
else if(d[i][j] == d[i][k] + d[k][j]){
c[i][j]++;
}
}
}
}
int maxv=0, cnt=0;
f(i,1,n+1){
f(j,i+1,n+1){
if(d[i][j] > maxv){
maxv=d[i][j];
cnt=c[i][j];
}
else if(d[i][j] == maxv){
cnt+=c[i][j];
}
}
}
cout<<cnt<<endl;
return 0;
}
Compilation message
shymbulak.cpp: In function 'int main()':
shymbulak.cpp:79:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d",&n);
~~~~~^~~~~~~~~
shymbulak.cpp:88:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d %d",&u,&v);
~~~~~^~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
376 KB |
Output is correct |
| 2 |
Correct |
2 ms |
376 KB |
Output is correct |
| 3 |
Correct |
2 ms |
540 KB |
Output is correct |
| 4 |
Correct |
2 ms |
540 KB |
Output is correct |
| 5 |
Correct |
3 ms |
632 KB |
Output is correct |
| 6 |
Correct |
2 ms |
632 KB |
Output is correct |
| 7 |
Correct |
2 ms |
632 KB |
Output is correct |
| 8 |
Correct |
3 ms |
632 KB |
Output is correct |
| 9 |
Correct |
2 ms |
808 KB |
Output is correct |
| 10 |
Correct |
2 ms |
808 KB |
Output is correct |
| 11 |
Correct |
3 ms |
808 KB |
Output is correct |
| 12 |
Correct |
2 ms |
808 KB |
Output is correct |
| 13 |
Correct |
13 ms |
1996 KB |
Output is correct |
| 14 |
Correct |
262 ms |
6604 KB |
Output is correct |
| 15 |
Correct |
284 ms |
6604 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
815 ms |
10060 KB |
Output is correct |
| 2 |
Correct |
1165 ms |
12108 KB |
Output is correct |
| 3 |
Execution timed out |
1557 ms |
16636 KB |
Time limit exceeded |
| 4 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
7 ms |
16636 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 2 |
Halted |
0 ms |
0 KB |
- |
