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OI-codes/Luogu/problem/P3371/P3371.cpp

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#include <bits/stdc++.h>
using namespace std;
int n, m, s, x, y, z, g[10005][10005], dist[10005];
bool st[10005];
void diskstra() {
memset(dist, 0x3f, sizeof(dist));
dist[s] = 0;
for (int i = 0; i < n - 1; i++) {
int t = -1;
for (int j = 1; j <= n; j++) {
if (!st[j] && (t == -1 || dist[t] > dist[j])) {
t = j;
}
}
for (int j = 1; j <= n; j++) {
dist[j] = min(dist[j], dist[t] + g[t][j]);
}
st[t] = true;
}
}
int main() {
cin >> n >> m >> s;
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= n; j++) {
g[i][j] = i == j ? 0 : 0x3f3f3f3f;
}
}
for (int i = 1; i <= m; i++) {
cin >> x >> y >> z;
g[x][y] = min(g[x][y], z);
}
diskstra();
for (int i = 1; i <= n; i++) {
cout << (dist[i] == 0x3f3f3f3f ? INT_MAX : dist[i]) << ' ';
}
cout << endl;
return 0;
}