4 files changed, 144 insertions, 0 deletions
diff --git a/store/works/life/chuanzhi-cup/contest/1.cpp b/store/works/life/chuanzhi-cup/contest/1.cpp
new file mode 100644
index 0000000..4a20d97
--- /dev/null
+++ b/store/works/life/chuanzhi-cup/contest/1.cpp
@@ -0,0 +1,22 @@
+#include <cstdio>
+
+int main() {
+  int n, v, m, a;
+  std::scanf("%d%d%d%d", &n, &v, &m, &a);
+
+  int money = 0;
+
+  v -= a;
+
+  for (int i = 0; i < n; i++) {
+    if (i % m == 0) {
+      v += a;
+    }
+
+    money += v;
+  }
+
+  std::printf("%d", money);
+
+  return 0;
+}
+\ No newline at end of file
diff --git a/store/works/life/chuanzhi-cup/contest/2.cpp b/store/works/life/chuanzhi-cup/contest/2.cpp
new file mode 100644
index 0000000..358e7fc
--- /dev/null
+++ b/store/works/life/chuanzhi-cup/contest/2.cpp
@@ -0,0 +1,28 @@
+#include <cmath>
+#include <cstdio>
+
+int main() {
+  int x;
+  std::scanf("%d", &x);
+
+  double gpa;
+
+  if (x >= 90)
+    gpa = 4.0;
+  else if (x >= 60) {
+    gpa = (x - 50.0) / 10.0;
+  } else {
+    int s = std::floor(std::sqrt(x) * 10.0);
+    if (s >= 90)
+      gpa = 4.0;
+    else if (s >= 60) {
+      gpa = (s - 50.0) / 10.0;
+    } else {
+      gpa = 0;
+    }
+  }
+
+  std::printf("%.1f", gpa);
+
+  return 0;
+}
+\ No newline at end of file
diff --git a/store/works/life/chuanzhi-cup/contest/3.cpp b/store/works/life/chuanzhi-cup/contest/3.cpp
new file mode 100644
index 0000000..8f0769d
--- /dev/null
+++ b/store/works/life/chuanzhi-cup/contest/3.cpp
@@ -0,0 +1,46 @@
+#include <cstdio>
+#include <set>
+
+struct V {
+  V(int n, int t, int k) : n(n), t(t), k(k), c(t * k) {}
+
+  int n;
+  int t;
+  int k;
+  const int c;
+};
+
+struct C {
+  bool operator()(const V &left, const V &right) const {
+    if (left.c > right.c)
+      return true;
+    else if (left.c < right.c)
+      return false;
+    else if (left.t > right.t)
+      return true;
+    else if (left.t < right.t)
+      return false;
+    else if (left.n < right.n)
+      return true;
+    return false;
+  }
+};
+
+int main() {
+  std::set<V, C> data;
+
+  int n;
+  std::scanf("%d", &n);
+
+  for (int i = 1; i <= n; i++) {
+    int t, k;
+    std::scanf("%d%d", &t, &k);
+    data.insert(V{i, t, k});
+  }
+
+  for (const auto &v : data) {
+    std::printf("%d ", v.n);
+  }
+
+  return 0;
+}
+\ No newline at end of file
diff --git a/store/works/life/chuanzhi-cup/contest/4.cpp b/store/works/life/chuanzhi-cup/contest/4.cpp
new file mode 100644
index 0000000..da01a23
--- /dev/null
+++ b/store/works/life/chuanzhi-cup/contest/4.cpp
@@ -0,0 +1,48 @@
+#include <algorithm>
+#include <cstdio>
+#include <iostream>
+#include <string>
+#include <vector>
+
+int main() {
+  std::vector<std::string> files;
+  int n;
+  std::cin >> n;
+  int current_count = 0;
+  while (current_count < n) {
+    std::string command;
+    std::cin >> command;
+    char a = command[0];
+    if (a == 't') {
+      std::string file;
+      std::cin >> file;
+      auto iter = std::find(files.cbegin(), files.cend(), file);
+      if (iter == files.cend()) {
+        files.push_back(std::move(file));
+      }
+    } else if (a == 'l') {
+      for (const auto &f : files) {
+        std::cout << f << '\n';
+      }
+    } else {
+      char b = command[1];
+      if (b == 'm') {
+        std::string file;
+        auto iter = std::find(files.cbegin(), files.cend(), file);
+        if (iter != files.cend())
+          files.erase(iter);
+      } else {
+        std::string old, new_f;
+        std::cin >> old >> new_f;
+        auto iter = std::find(files.begin(), files.end(), old);
+        auto iter2 = std::find(files.begin(), files.end(), new_f);
+        if (iter != files.end() && iter2 == files.end()) {
+          *iter = std::move(new_f);
+        }
+      }
+    }
+    current_count++;
+  }
+
+  return 0;
+}