week17 solve

week17/A_32160/burningfalls/32160.cpp

@@ -0,0 +1,35 @@
+#include <bits/stdc++.h>
+using namespace std;
+
+#define FASTIO cin.tie(0); ios_base::sync_with_stdio(0);
+
+int main() {
+    FASTIO;
+    int N;
+    cin >> N;
+
+    if ((N / 2) % 2 == 0) {
+        cout << N;
+    } else {
+        cout << N - 1;
+    }
+    cout << "\n";
+
+    int num = N - 1;
+    for(int i = N - 2; i >= 1; i--) {
+        cout << i << " " << num << "\n";
+        num = abs(i - num);
+    }
+    cout << N << " " << num << "\n";
+
+    return 0;
+}
+
+
+
+
+
+
+
+
+

week17/B_31997/burningfalls/31997.cpp

@@ -0,0 +1,43 @@
+#include <bits/stdc++.h>
+using namespace std;
+
+#define FASTIO cin.tie(0); ios_base::sync_with_stdio(0);
+
+int main() {
+    FASTIO;
+    int N, M, T;
+    cin >> N >> M >> T;
+    vector<pair<int, int>> v(N + 1);
+    for(int i = 1; i <= N; i++) {
+        cin >> v[i].first >> v[i].second;
+    }
+
+    vector<int> sum(T + 1, 0);
+    for(int i = 1; i <= M; i++) {
+        int c, d;
+        cin >> c >> d;
+        int left = max(v[c].first, v[d].first);
+        int right = min(v[c].second, v[d].second);
+        if (left >= right) continue;
+        sum[left]++;
+        sum[right]--;
+    }
+
+    for(int i = 1; i <= T; i++) {
+        sum[i] = sum[i - 1] + sum[i];
+    }
+
+    for(int i = 0; i < T; i++) {
+        cout << sum[i] << "\n";
+    }
+
+    return 0;
+}
+
+
+
+
+
+
+
+

week17/C_31932/burningfalls/31932.cpp

@@ -0,0 +1,86 @@
+#include <bits/stdc++.h>
+using namespace std;
+
+#define FASTIO cin.tie(0); ios_base::sync_with_stdio(0);
+#define ll long long
+#define LINF 1e18
+#define MAX 100001
+
+struct NODE1 {
+    ll n;
+    ll d;
+    ll t;
+};
+
+struct NODE2 {
+    ll n;
+    ll d;
+
+    bool operator<(const NODE2& node) const {
+        return d > node.d;
+    }
+};
+
+int N, M;
+vector<vector<NODE1>> Edge(MAX, vector<NODE1>());
+vector<ll> dist(MAX, LINF);
+priority_queue<NODE2> pq;
+
+void DT(ll snode, ll stime) {
+    dist[snode] = stime;
+    pq.push({snode, dist[snode]});
+    while(!pq.empty()) {
+        NODE2 cur = pq.top();
+        pq.pop();
+        if (cur.d > dist[cur.n]) continue;
+        for(int i = 0; i < Edge[cur.n].size(); i++) {
+            ll next = Edge[cur.n][i].n;
+            ll ndist = cur.d + Edge[cur.n][i].d;
+            if (ndist > Edge[cur.n][i].t) continue;
+            if (dist[next] > ndist) {
+                dist[next] = ndist;
+                pq.push({next, dist[next]});
+            }
+        }
+    }
+}
+
+int main() {
+    FASTIO;
+    cin >> N >> M;
+    for(int i = 1; i <= M; i++) {
+        ll u, v, d, t;
+        cin >> u >> v >> d >> t;
+        Edge[u].push_back({v, d, t});
+        Edge[v].push_back({u, d, t});
+    }
+
+    ll left = 0, right = LINF;
+    ll ans = -1;
+    while(left <= right) {
+        ll mid = (left + right) / 2;
+        for(int i = 1; i <= N; i++) {
+            dist[i] = LINF;
+        }
+        DT(1, mid);
+
+        if (dist[N] != LINF) {
+            ans = mid;
+            left = mid + 1;
+        } else if (dist[N] == LINF) {
+            right = mid - 1;
+        }
+    }
+    cout << ans << "\n";
+
+    return 0;
+}
+
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