diff --git a/src/P1522/P1522.cpp b/src/P1522/P1522.cpp
index 45bcb1a..00d7868 100644
--- a/src/P1522/P1522.cpp
+++ b/src/P1522/P1522.cpp
@@ -6,7 +6,6 @@
 #include <iostream>
 #include <limits>
 #include <string>
-#include <bitset>
 
 #define NV(v)#v<<" : "<<(v)
 #ifdef NDEBUG
@@ -25,8 +24,8 @@ Point points[max_n];
 std::string s;
 double mtx_len[max_n][max_n];
 double max_len[max_n];
-const double double_inf = std::numeric_limits<double>::max(), double_min = std::numeric_limits<double>::min();
-double min_ans = std::numeric_limits<double>::max();
+const double double_max = std::numeric_limits<double>::max(), double_min = std::numeric_limits<double>::min();
+double min_ans {double_max}, default_ans{double_min};
 
 double len(const Point &p1, const Point &p2){
     return std::sqrt(
@@ -51,8 +50,9 @@ int main(){
             }
             if(s[j-1]=='1'){
                 mtx_len[i][j] = len(points[i],points[j]);
+                default_ans = std::max(default_ans,mtx_len[i][j]); 
             }else{
-                mtx_len[i][j] = double_inf;
+                mtx_len[i][j] = double_max;
             }
         }
     }
@@ -60,7 +60,7 @@ int main(){
         for(ull i=1;i<=n;i++){
             for(ull j=1;j<=n;j++){
                 double new_len;
-                if(mtx_len[i][k]!=double_inf && mtx_len[k][j]!=double_inf){
+                if(mtx_len[i][k]!=double_max && mtx_len[k][j]!=double_max){
                     new_len = mtx_len[i][k]+mtx_len[k][j];
                 }else{
                     continue;
@@ -74,10 +74,10 @@ int main(){
     }
 
     for(ull i=1;i<=n;i++){
-        max_len[i]=double_inf;
+        max_len[i]=double_max;
         for(ull j=1;j<=n;j++){
-            if(mtx_len[i][j]==double_inf)continue;
-            max_len[i] = std::max(mtx_len[i][j],(max_len[i]==double_inf?double_min:max_len[i]));
+            if(mtx_len[i][j]==double_max)continue;
+            max_len[i] = std::max(mtx_len[i][j],(max_len[i]==double_max?double_min:max_len[i]));
         }
     }
     DEBUG(
@@ -85,7 +85,7 @@ int main(){
     )
     for(ull i=1;i<=n;i++){
         for(ull j=i+1;j<=n;j++){
-            if(mtx_len[i][j]==double_inf){
+            if(mtx_len[i][j]==double_max){
                 DEBUG(
                     std::cout<<NV(i)<<'\n'<<NV(j)<<'\n'<<NV(max_len[i])<<'\n'<<NV(max_len[j])<<'\n'
                         <<NV(len(points[i], points[j]))<<'\n'<<NV(max_len[i]+ len(points[i], points[j]) + max_len[j])<<'\n';
@@ -99,5 +99,5 @@ int main(){
         }
     }
 
-    std::cout<<std::fixed<<std::setprecision(6)<<min_ans<<'\n';
+    std::cout<<std::fixed<<std::setprecision(6)<<std::max(min_ans, default_ans)<<'\n';
 }
\ No newline at end of file