HDU1690 (Floyd)
题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1690
Wa了久,终于解决了,现在放出代码。
代码如下:
#include <iostream>
using namespace std;
const long long INF = 99999999999LL; //INF要开得非常大才可以过,一直Wa就因为这个原因
const int N = 101;
long long map[N][N];
void floyd(int n, int m, int r);
void output(int m, int r);
int main()
{
int t, i, j, k, len;
int l1, l2, l3, l4, c1, c2, c3, c4;
int n, m;
int place[N];
scanf("%d", &t);
for(k = 1; k <= t; k++)
{
scanf("%d%d%d%d%d%d%d%d", &l1, &l2, &l3, &l4, &c1, &c2, &c3, &c4);
scanf("%d%d", &n, &m);
for(i = 1; i <= n; i++)
{
scanf("%d", &place[i]);
}
for(i = 1; i <= n; i++)
{
for(j = 1; j <= n; j++)
{
if(i == j)
{
map[i][j] = 0;
}
else
{
map[i][j] = INF;
}
}
}
for(i = 1; i <= n; i++)
{
for(j = i + 1; j <= n; j++)
{
len = abs(place[i] - place[j]);
if(0 < len && len <= l1)
{
map[i][j] = map[j][i] = c1;
}
else if(l1 < len && len <= l2)
{
map[i][j] = map[j][i] = c2;
}
else if(l2 < len && len <= l3)
{
map[i][j] = map[j][i] = c3;
}
else if(l3 < len && len <= l4)
{
map[i][j] = map[j][i] = c4;
}
}
}
floyd(n, m, k);
}
return 0;
}
void floyd(int n, int m, int r)
{
int i, j, k;
for(k = 1; k <= n; k++)
{
for(i = 1; i <= n; i++)
{
for(j = 1; j <= n; j++)
{
if(map[i][j] > map[i][k] + map[k][j])
{
map[i][j] = map[i][k] + map[k][j];
}
}
}
}
output(m, r);
}
void output(int m, int r)
{
int i, j;
printf("Case %d:\n", r);
while(m--)
{
scanf("%d %d", &i, &j);
if(map[i][j] != INF)
{
printf("The minimum cost between station %d and station %d is %I64d.\n", i, j, map[i][j]);
}
else
{
printf("Station %d and station %d are not attainable.\n", i, j);
}
}
}