Solved some problem from codechef and codeforces

1 files changed, 31 insertions, 0 deletions

diff --git a/codechef/jogging/main.cpp b/codechef/jogging/main.cpp
new file mode 100644
index 0000000..e28bc48
--- /dev/null
+++ b/codechef/jogging/main.cpp
@@ -0,0 +1,31 @@
+#include<bits/stdc++.h>
+
+
+using namespace std;
+
+#define MOD 1000000007
+
+long long power(long long b, int p) {
+  long long res = 1;
+  while(p) {
+    if(p % 2) res = (res * b) % MOD;
+    b = (b * b) % MOD;
+    p /= 2;
+  }
+  return res;
+}
+
+int main () {
+	ios_base::sync_with_stdio(false);
+	cin.tie(NULL);
+	int tt;
+	cin >> tt;
+	while(tt--){
+    int n;
+    int x;
+    cin >> n >> x;
+    long long y = power(2 ,n - 1);
+    long long ans = (x * y) % MOD;
+    cout << ans << endl;
+	}
+}