Create timeline.cpp

1 files changed, 37 insertions, 0 deletions

diff --git a/2020/February/Gold/timeline.cpp b/2020/February/Gold/timeline.cpp
new file mode 100644
index 0000000..6a9c217
--- /dev/null
+++ b/2020/February/Gold/timeline.cpp
@@ -0,0 +1,37 @@
+#include <bits/stdc++.h>
+#define f first
+#define s second
+using namespace std;
+typedef pair<int, int> ii;
+
+int S[100001];
+vector<ii> G[100001];
+
+int main() {
+	ifstream cin("timeline.in");
+	ofstream cout("timeline.out");
+
+	int N, M, C;
+	cin >> N >> M >> C;
+	for (int i = 0; i < N; ++i) cin >> S[i];
+	for (int i = 0; i < C; ++i) {
+		int a, b, x;
+		cin >> a >> b >> x;
+		G[--a].emplace_back(--b, -x);
+	}
+	for (int i = 0; i < N; ++i) S[i] = -S[i];
+	priority_queue<ii, vector<ii>, greater<ii>> pq;
+	for (int i = 0; i < N; ++i) pq.emplace(S[i], i);
+	while (!pq.empty()) {
+		int d = pq.top().f, u = pq.top().s;
+		pq.pop();
+		if (d > S[u]) continue;
+		for (auto& v : G[u]) {
+			if (S[u] + v.s < S[v.f]) {
+				S[v.f] = S[u] + v.s;
+				pq.emplace(S[v.f], v.f);
+			}
+		}
+	}
+	for (int i = 0; i < N; ++i) cout << -S[i] << '\n';
+}