01

2022/01/Makefile

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+CXX ?= c++
+CXXFLAGS ?= -std=c++11 -Wall -Wextra -pedantic -O2
+PROJECT = calories
+
+all: ${PROJECT}
+
+${PROJECT}: main.cpp
+	${CXX} ${CXXFLAGS} -o $@ $^
+
+test: ${PROJECT}
+	./${PROJECT}
+
+clean:
+	${RM} *.o ${PROJECT}
+
+.PHONY: all clean test

2022/01/main.cpp

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+#include <fstream>
+#include <iostream>
+#include <sstream>
+#include <vector>
+#include <algorithm>
+
+std::vector<uint64_t> getCalories( std::ifstream &file ) {
+    std::vector<uint64_t> ret{};
+    ret.push_back({});
+    uint64_t tmp = 0;
+    std::string str;
+    uint64_t calories = 0;
+    while ( std::getline( file, str ) ) {
+        if(str.empty()) {
+            ret.push_back(calories);
+            calories = 0;
+            continue;
+        }
+        std::stringstream ss( str );
+        ss >> tmp;
+        calories += tmp;
+    }
+    ret.push_back(calories);
+    std::sort(ret.begin(), ret.end());
+    std::reverse(ret.begin(), ret.end());
+    return ret;
+}
+
+uint64_t getHighestCaloriesElf(const std::vector<uint64_t> &elves) {
+    return elves[0];
+}
+
+uint64_t get3HighestCaloriesElf(const std::vector<uint64_t> &elves) {
+    return elves[0] + elves[1] + elves[2];
+}
+
+int main() {
+    std::ifstream input_file( "input" );
+    auto elves = getCalories( input_file );
+    int part1 = getHighestCaloriesElf(elves);
+    std::cout << "The elf carrying the most calories is carrying \033[91;1m" << part1
+              << "\033[0m calories." << std::endl;
+    int part2 = get3HighestCaloriesElf(elves);
+    std::cout << "The 3 elves carrying the most calories are carrying \033[91;1m" << part2
+              << "\033[0m calories in total." << std::endl;
+}