OJ-Problems-Source/HDOJ/3991_autoAC.cpp

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2.4 KiB
C++
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#include <cstdio>
#include <cstring>
struct EDGE
{
int v, next;
}edge[2010010];
struct NODE
{
int p;
long long t;
}node[1010];
const long long inf = 1ll<<60;
long long map[105][105];
bool usedif[1005];
int link[1005];
int head[1010];
int cnt, gx, gy;
bool cmp(NODE a, NODE b)
{
return a.t < b.t;
}
void addedge(int u, int v)
{
edge[cnt].v = v;
edge[cnt].next = head[u];
head[u] = cnt++;
}
bool can(int t)
{
for(int p = head[t]; p != -1; p = edge[p].next)
{
int i = edge[p].v;
if(usedif[i]==0)
{
usedif[i]=1;
if(link[i]==-1||can(link[i]))
{
link[i]=t;
return true;
}
}
}
return false;
}
int MaxMatch()
{
int num=0;
memset(link,-1,sizeof(link));
for(int i=0; i< gx; i++)
{
memset(usedif,0,sizeof(usedif));
if(can(i)) num++;
}
return num;
}
int main()
{
int T;
scanf("%d", &T);
int cas = 1;
while(T--)
{
int n, m, q;
scanf("%d%d%d", &n, &m, &q);
int d = 1<< 30;
for(int i = 0; i < n; i++)
for(int j = 0; j < n; j++)
if(i != j) map[i][j] = inf;
else map[i][j] = 0;
while(m--)
{
int a, b;
long long c;
scanf("%d%d%I64d", &a, &b, &c);
if(map[a][b] > c)
{
map[a][b] = map[b][a] = c;
}
}
for(int k = 0; k < n; k++)
for(int i = 0; i < n; i++)
{
if(i == k) continue;
if(map[i][k] == inf) continue;
for(int j = 0; j < n; j++)
if(map[k][j] != inf && map[i][k] + map[k][j] < map[i][j])
{
map[i][j] = map[i][k] + map[k][j];
}
}
for(int i = 0; i < q; i++)
{
scanf("%d%d", &node[i].p, &node[i].t);
}
gx = q;
cnt = 0;
memset(head, -1, sizeof(head));
for(int i = 0; i < q; i++)
{
for(int j = 0; j < q; j++)
if(i != j && node[j].t - node[i].t >= map[node[i].p][node[j].p])
{
addedge(i, j);
}
}
int ans = gx - MaxMatch();
printf("Case %d: %d\n", cas++, ans - 1);
}
return 0;
}