제출 #68466

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
68466		tempytemptemp	관광지 (IZhO14_shymbulak)	C++14	0 / 100	306 ms	4816 KiB

shymbulak

/*
  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=5e2;
int d[N][N];
int c[N][N];
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;
}

컴파일 시 표준 에러 (stderr) 메시지

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);
   ~~~~~^~~~~~~~~~~~~~~

• Subtask 1: 0 / 30
• Subtask 2: 0 / 20
• Subtask 3: 0 / 50