using vector.back()

src/days/01/Day01.cpp

@@ -6,7 +6,7 @@ Result Day01::Task1() {
 		if (line.empty())
 			subSums.push_back(0);
 		else
-			subSums[subSums.size() - 1] += stoi(line);
+			subSums.back() += stoi(line);
 	}
 	return to_string(*std::max_element(subSums.begin(), subSums.end()));
 }