'commit'

TangDou/LanQiaoBei/LanQiao14STEMA202212/4.cpp

@@ -3,8 +3,8 @@
 using namespace std;
 const int INF = 0x3f3f3f3f;
 const int N = 110;
-int n; //电桩数
-int d; //冲一次电能跑的距离
+int n; // 电桩数
+int d; // 冲一次电能跑的距离
 int res = INF;
 int a[N];
 /*
@@ -20,9 +20,18 @@ void dfs(int u, int r, int c) {
         res = min(res, c);
         return;
     }
-    if (r + d >= a[u + 1]) dfs(u + 1, r + d - a[u + 1], c + 1);
+    // 现在剩余的油量是r,加满的话油量是d
+    //  如果现在剩余的油量r不足以跑完下一个路a[u+1],那么必须在本站加油到d
+    if (d < a[u + 1]) {
+        cout << -1 << endl;
+        exit(0);
+    }
 
-    if (r >= a[u + 1]) dfs(u + 1, r - a[u + 1], c);
+    if (r >= a[u + 1]) { // 我有两种选择：1、在本站不加油，2、我就加满
+        dfs(u + 1, r - a[u + 1], c);
+        dfs(u + 1, d - a[u + 1], c + 1);
+    } else
+        dfs(u + 1, d - a[u + 1], c + 1);
 }
 int main() {
     cin >> n >> d;

TangDou/LanQiaoBei/ZhongGaoJi/LanQiao15STEMA202312/TD.cpp

@@ -1,22 +1,30 @@
 #include <bits/stdc++.h>
 using namespace std;
-int k;
-string kill(string s) {
-    int p = 0;
-    for (int i = 0; i < s.size() - 1; i++)
-        if (s[i + 1] > s[i]) {
-            p = i;
-            break;
-        }
-    string res;
-    for (int i = 0; i < s.size(); i++)
-        if (i != p) res += s[i];
-    return res;
-}
+const int N = 110;
+
+struct Node {
+    int id;
+    int score;
+    const bool operator<(const Node &t) {
+        if (score == t.score) return id < t.id;
+        return score > t.score;
+    }
+} a[N];
+/*
+3
+3 84
+1 87
+2 84
+*/
 int main() {
-    string s;
-    cin >> s >> k;
-    for (int i = 1; i <= k; i++) s = kill(s);
-    cout << s;
+    int n;
+    cin >> n;
+    for (int i = 1; i <= n; i++)
+        cin >> a[i].id >> a[i].score;
+
+    sort(a + 1, a + 1 + n);
+
+    for (int i = 1; i <= n; i++)
+        cout << a[i].id << " " << a[i].score << endl;
     return 0;
-}
+}

TangDou/LanQiaoBei/ZhongGaoJi/LanQiao15STEMA202312/sg.cpp

@@ -0,0 +1,21 @@
+#include <bits/stdc++.h>
+using namespace std;
+const int N=110;
+ struct Node {
+    int id;
+    int fen;
+    bool operator<(const Node &t)  {
+        if (fen == t.fen) return id < t.id;
+        return fen > t.fen;
+    }
+} a[N];
+
+ 
+int main() {
+    int n;
+    cin >> n;
+    for (int i = 1; i <= n; i++) cin >> a[i].id >> a[i].fen;
+    sort(a+1, a + n+1);
+    for (int i = 1; i <= n; i++) cout << a[i].id << " " << a[i].fen << endl;
+    return 0;
+}