题目链接:
https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&page=show_problem&problem=508
题意:20个点的任意最短路。floyd
代码:
#include <stdio.h>
#include <ctime>
#include <math.h>
#include <string>
#include <iterator>
#include <algorithm>
#include <vector>
#include <stack>
#include <queue>
#include <set>
#include <map>
#include <iostream>
#include <ctime>
#include <cmath>
#include <cstring>
using namespace std;
int a[25][25];
char c;
int main()
{
int cases=1;
int n,m;
while (~scanf("%d",&n))
{
for(int i=1;i<=20;i++)
for(int j= 1;j<=20;j++)
{
if (i==j) a[i][j] = 0;
else a[i][j] = 100000000;
}
while(n--)
{
scanf("%d",&m);
a[1][m] = a[m][1] = 1;
}
for(int i=2;i<=19;i++)
{
scanf("%d",&n);
while(n--)
{
scanf("%d",&m);
a[i][m] = a[m][i] = 1;
}
}
for(int k=1;k<=20;k++)
for(int i=1;i<=20;i++)
for(int j= 1;j<=20;j++)
{
if (a[i][k] + a[k][j] < a[i][j])
a[i][j] = a[i][k] + a[k][j];
}
int s,d;
scanf("%d",&n);
printf("Test Set #%d\n",cases++);
while(n--)
{
scanf("%d%d",&s,&d);
printf("%2d to %2d: %d\n",s,d,a[s][d]);
}
printf("\n");
}
return 0;
}
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时间: 2024-10-09 18:23:07