delete pics to save space

1.1426.cpp

@@ -0,0 +1,11 @@
+#include<cstdio>
+#include<cmath>
+int main()
+{
+    double s,x,tEnter,tExit;
+    scanf("%lf%lf",&s,&x);
+    tEnter=log(1-0.02*(s-x)/7)/log(0.98);
+    tExit=log(1-0.02*(s+x)/7)/log(0.98);
+    printf("%c",tExit-tEnter>=1?'y':'n');
+    return 0;
+}