[BOJ 14620] 꽃길

src/week3/BOJ14620/BOJ14620_V1.cpp

@@ -0,0 +1,72 @@
+#include <bits/stdc++.h>
+using namespace std;
+int N;
+int isplanted[10][10];
+int inp_map[10][10];
+int dy[4] = {0, 1, 0, -1};
+int dx[4] = {1, 0, -1, 0};
+int ret = INT_MAX;
+bool canPlant(int y, int x) {
+    for (int k = 0; k < 4; k++) {
+        int vy = y + dy[k];
+        int vx = x + dx[k];
+        if (0 > vy || vy >= N || 0 > vx || vx >= N || isplanted[vy][vx]) {
+            return false;
+        }
+    }
+    return true;
+}
+int plant(int y, int x) {
+    int cost = inp_map[y][x];
+    for (int k = 0; k < 4; k++) {
+        int vy = y + dy[k];
+        int vx = x + dx[k];
+        isplanted[vy][vx] = 1;
+        cost += inp_map[vy][vx];
+    }
+
+    return cost;
+}
+void unplant(int y, int x) {
+    for (int k = 0; k < 4; k++) {
+        int vy = y + dy[k];
+        int vx = x + dx[k];
+        isplanted[vy][vx] = 0;
+    }
+}
+void solve(int cost, int cnt) {
+    if (cnt == 3) {
+        ret = min(ret, cost);
+    }
+
+    for (int i=0; i<N; i++) {
+        for (int j=0; j<N; j++) {
+            if (canPlant(i, j)) {
+                int next_cost = cost + plant(i, j);
+                solve(next_cost, cnt + 1);
+                unplant(i, j);
+            }
+        }
+    }
+}
+int main() {
+
+    ios_base::sync_with_stdio(false);
+    cin.tie(NULL);
+    cout.tie(NULL);
+
+    cin >> N;
+    for (int i = 0; i < N; i++) {
+        for (int j = 0; j < N; j++) {
+            cin >> inp_map[i][j];
+        }
+    }
+
+    solve(0,0);
+
+    cout << ret << '\n';
+
+
+
+    return 0;
+}