advent2024

commit a87ad3701305cabdc637c1d94922014b4c0cb925
parent 4fa261e7e673f777b63de4f98918d71a8d6c3490
Author: bsandro <email@bsandro.tech>
Date:   Sat, 14 Dec 2024 23:07:10 +0200

Day 14 p1 cleanup

Diffstat:
M
day14/main.cpp
 | 
37
++++++++++++++++---------------------

1 file changed, 16 insertions(+), 21 deletions(-)
diff --git a/day14/main.cpp b/day14/main.cpp
@@ -57,40 +57,35 @@ int countRobots(const Data &robots, const Vec2 &from, const Vec2 &to) {
     });
 }
 
-int64_t part1(Data input, Vec2 mapSize) {
-    int64_t out = 1;
-    std::printf("map size: %dx%d\n", mapSize.x, mapSize.y);
-    //printMap(input, mapSize);
-    for (auto &r:input) {
-        // std::printf("Robot pos: %d,%d; velocity: %d,%d\n", r.p.x, r.p.y, r.v.x, r.v.y);
-        r.p.x += r.v.x*100;
-        r.p.y += r.v.y*100;
+void moveRobots(Data &robots, const Vec2 &mapSize, int seconds) {
+    for (auto &r:robots) {
+        r.p.x += r.v.x*seconds;
+        r.p.y += r.v.y*seconds;
         r.p.x %= mapSize.x;
         r.p.y %= mapSize.y;
         if (r.p.x<0) r.p.x += mapSize.x;
         if (r.p.y<0) r.p.y += mapSize.y;
-        // std::printf("100s later: %d,%d\n", r.p.x, r.p.y);
     }
-    printMap(input, mapSize);
+}
 
-    auto quadrantCount = [&input](const Vec2 &from, const Vec2 &to) -> int {
-        int cnt = countRobots(input, from, to);
-        // std::printf("robots in (%d:%d->%d:%d): %d\n", from.x, from.y, to.x, to.y, cnt);
-        return cnt;
-    };
+int64_t part1(Data input, Vec2 mapSize) {
+    int64_t out = 1;
+    //std::printf("map size: %dx%d\n", mapSize.x, mapSize.y);
+    //printMap(input, mapSize);
+    moveRobots(input, mapSize, 100);
+    //printMap(input, mapSize);
 
-    out *= quadrantCount(Vec2(0, mapSize.y/2-1), Vec2(mapSize.x/2-1, 0));
-    out *= quadrantCount(Vec2(mapSize.x/2+1, mapSize.y/2-1), Vec2(mapSize.x-1, 0));
-    out *= quadrantCount(Vec2(0, mapSize.y-1), Vec2(mapSize.x/2-1, mapSize.y/2+1));
-    out *= quadrantCount(Vec2(mapSize.x/2+1, mapSize.y-1), Vec2(mapSize.x-1, mapSize.y/2+1));
+    out *= countRobots(input, Vec2(0, mapSize.y/2-1), Vec2(mapSize.x/2-1, 0));
+    out *= countRobots(input, Vec2(mapSize.x/2+1, mapSize.y/2-1), Vec2(mapSize.x-1, 0));
+    out *= countRobots(input, Vec2(0, mapSize.y-1), Vec2(mapSize.x/2-1, mapSize.y/2+1));
+    out *= countRobots(input, Vec2(mapSize.x/2+1, mapSize.y-1), Vec2(mapSize.x-1, mapSize.y/2+1));
 
     return out;
 }
 int64_t part2(Data &input [[ maybe_unused ]]) {
     return 0;
 }
-// 506 too low
-// 246740364 too high
+
 int main(int argc, char **argv) {
     Performance perf;
     const std::string fname = argc>1 ? argv[1] : "test1.txt";