Solved a couple of problems on codeforces

12 files changed, 135 insertions, 0 deletions

diff --git a/MarkTheDustSweeper/main b/MarkTheDustSweeper/main
new file mode 100755
index 0000000..0ceccde
--- /dev/null
+++ b/MarkTheDustSweeper/main
diff --git a/MarkTheDustSweeper/main.cpp b/MarkTheDustSweeper/main.cpp
new file mode 100644
index 0000000..6335886
--- /dev/null
+++ b/MarkTheDustSweeper/main.cpp
@@ -0,0 +1,39 @@
+#include<bits/stdc++.h>
+
+using namespace std;
+
+
+int main () {
+	ios_base::sync_with_stdio(false);
+	cin.tie(NULL);
+	int tt;
+	cin >> tt;
+	while(tt--){
+    int n;
+    cin >> n;
+    long long ans = 0;
+    vector<int> v(n);
+    long long sum = 0;
+    for (auto &x : v) {
+      cin >> x;
+      sum += x;
+    }
+    if(sum != v[n - 1]) {
+      int ind;
+      for(int i = 0; i < n; i++) {
+        if(v[i] != 0) {
+          ind = i;
+          break;
+        }
+      }
+      for(int i = ind; i < n - 1; i++) {
+        if(v[i] == 0) {
+          ans += 1;
+        } else{
+          ans += v[i];
+        }
+      }
+    }
+    cout << ans << endl;
+	}
+}
diff --git a/MarkTheDustSweeper/main_input0.txt b/MarkTheDustSweeper/main_input0.txt
new file mode 100644
index 0000000..ad05cd8
--- /dev/null
+++ b/MarkTheDustSweeper/main_input0.txt
@@ -0,0 +1,9 @@
+4
+3
+2 0 0
+5
+0 2 0 2 0
+6
+2 0 3 0 4 6
+4
+0 0 0 10
diff --git a/MarkTheDustSweeper/main_output0.txt b/MarkTheDustSweeper/main_output0.txt
new file mode 100644
index 0000000..0c8b213
--- /dev/null
+++ b/MarkTheDustSweeper/main_output0.txt
@@ -0,0 +1,4 @@
+3
+5
+11
+0
diff --git a/MarkThePhotographer/main b/MarkThePhotographer/main
new file mode 100755
index 0000000..eaaf214
--- /dev/null
+++ b/MarkThePhotographer/main
diff --git a/MarkThePhotographer/main.cpp b/MarkThePhotographer/main.cpp
new file mode 100644
index 0000000..15c4e29
--- /dev/null
+++ b/MarkThePhotographer/main.cpp
@@ -0,0 +1,31 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+int main() {
+  ios_base::sync_with_stdio(false);
+  cin.tie(NULL);
+  int tt;
+  cin >> tt;
+  while (tt--) {
+    int n, y;
+    cin >> n >> y;
+    vector<int> v(2 * n);
+    int ans = 0;
+    for (int &x : v)
+      cin >> x;
+    sort(v.begin(), v.end());
+    for (int i = 0; i < n; i++) {
+      int x = v[i];
+      int z = v[i + n];
+      if (z - x >= y) {
+        ans++;
+      }
+    }
+    if (ans == n) {
+      cout << "YES" << '\n';
+    } else {
+      cout << "NO" << '\n';
+    }
+  }
+}
diff --git a/MarkThePhotographer/main_input0.txt b/MarkThePhotographer/main_input0.txt
new file mode 100644
index 0000000..3e55cb5
--- /dev/null
+++ b/MarkThePhotographer/main_input0.txt
@@ -0,0 +1,7 @@
+3
+3 6
+1 3 9 10 12 16
+3 1
+2 5 2 2 2 5
+1 2
+8 6
diff --git a/MarkThePhotographer/main_output0.txt b/MarkThePhotographer/main_output0.txt
new file mode 100644
index 0000000..0db7433
--- /dev/null
+++ b/MarkThePhotographer/main_output0.txt
@@ -0,0 +1,3 @@
+YES
+NO
+YES
diff --git a/yapapsai/main b/yapapsai/main
new file mode 100755
index 0000000..a26e653
--- /dev/null
+++ b/yapapsai/main
diff --git a/yapapsai/main.cpp b/yapapsai/main.cpp
new file mode 100644
index 0000000..2946e65
--- /dev/null
+++ b/yapapsai/main.cpp
@@ -0,0 +1,26 @@
+#include<bits/stdc++.h>
+
+using namespace std;
+
+int main () {
+	ios_base::sync_with_stdio(false);
+	cin.tie(NULL);
+	int tt;
+	cin >> tt;
+	while(tt--){
+    int n;
+    cin >> n;
+    vector<int> pos;
+    long long ans = 0;
+    for (int i = 1; i <= n; i++) {
+      int x;
+      cin >> x;
+      if (x < i) {
+        auto it = lower_bound(pos.begin(), pos.end(), x);
+        ans += it - pos.begin();
+        pos.emplace_back(i);
+      }
+    }
+    cout << ans << '\n';
+	}
+}
diff --git a/yapapsai/main_input0.txt b/yapapsai/main_input0.txt
new file mode 100644
index 0000000..bb1b141
--- /dev/null
+++ b/yapapsai/main_input0.txt
@@ -0,0 +1,11 @@
+5
+8
+1 1 2 3 8 2 1 4
+2
+1 2
+10
+0 2 1 6 3 4 1 2 8 3
+2
+1 1000000000
+3
+0 1000000000 2
diff --git a/yapapsai/main_output0.txt b/yapapsai/main_output0.txt
new file mode 100644
index 0000000..5859aa7
--- /dev/null
+++ b/yapapsai/main_output0.txt
@@ -0,0 +1,5 @@
+3
+0
+10
+0
+1