diff --git a/a1/program.c b/a1/program.c
index 66c232f..69e188e 100644
--- a/a1/program.c
+++ b/a1/program.c
@@ -6,7 +6,7 @@ int main()
     double x=0;
     double value =0;
     int count =0;
-    double arr[50];
+    double arr[50]={0};
   	scanf("%lf",&x);
     while(scanf("%lf",&value)!=EOF){
         if(isalpha(value)!=0){
@@ -16,7 +16,7 @@ int main()
         count++;
     }
     value=0;
-    for(int i =0;i<count;i++){
+    for(int i =0;i<count&&count-1-i>=0;i++){
         value+=arr[i]*pow(x,count-1-i);
     }