Added first failed testcase indicator in time-traveler (#14)

Author: TianLangHin

competition/time-traveler/src/main.cpp

@@ -169,16 +169,18 @@ int main(int argc, char* argv[]){
         }
 
         // Compare the submitted answers with the expected answers.
-        if (submittedAnswers == answers){
-            return 0;
-        }
-        else if (submittedAnswers.size() != answers.size()){
+        if (submittedAnswers.size() != answers.size()){
             std::cerr << "There should be " << NUM_TESTCASES << " entries, but got " << submittedAnswers.size() << ".\n";
             return 1;
         }
         else{
-            std::cerr << "Wrong answer\n";
-            return 1;
+            for (int i = 0; i < submittedAnswers.size(); ++i){
+                if (submittedAnswers[i] != answers[i]){
+                    std::cerr << "Test case " << (i + 1) << " is incorrect.\n";
+                    return 1;
+                }
+            }
+            return 0;
         }
     }
     else if (argv[1] == "solution"s){