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#3wa求调
P3371【模板】单源最短路径(弱化版)参与者 2已保存回复 4
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- 此快照首次捕获于
- 2023/10/22 13:12 2 年前
- 此快照最后确认于
- 2023/11/07 21:41 2 年前
CPP
#include <bits/stdc++.h>
using namespace std;
bool vis[114514];
const long long INF = 0x3f3f3f3f;
long long cnt;
struct edge
{
int v;
int w;
int next;
} edge[1145141];
int head[114514];
void addedge(int a, int b, int c)
{
cnt++;
edge[cnt].v = b;
edge[cnt].w = c;
edge[cnt].next = head[a];
head[a] = cnt;
}
int main()
{
long long minn;
long long dis[114514];
int n, m, s;
int a, b, c;
cin >> n >> m >> s;
for (int i = 1; i <= n; i++)
dis[i] = INF;
for (int i = 0; i < m; i++)
{
cin >> a >> b >> c;
addedge(a, b, c);
}
int cur = s;
dis[s] = 0;
while (!vis[cur])
{
vis[cur] = true;
for (int i = head[cur]; i != 0; i = edge[i].next)
{
if (!vis[edge[i].v] && dis[edge[i].v] > dis[cur] + edge[i].w)
dis[edge[i].v] = dis[cur] + edge[i].w;
}
long long minn = INF;
for (int i = 1; i <= n; i++)
{
if (!vis[i] && minn > dis[i])
{
minn = dis[i];
cur = i;
}
}
}
for (int i = 1; i <= n; i++)
cout << dis[i] << " ";
return 0;
}
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