Minyoung/week6

minyoung/week6/늑대문제.c

@@ -0,0 +1,90 @@
+#include <stdio.h>
+#include <string.h>
+
+int info[18];
+int edges[20][2];
+int n;
+int edge_len;
+int graph[18][18];
+int graph_cnt[18];
+int max_sheep = 0;
+int visited[18];
+void do_run();
+void do_print();
+void reset_state();
+void dfs(int node, int sheep, int wolf);
+
+int main() {
+
+    scanf("%d", &n);
+
+    for (int i = 0; i < n; i++) {
+        scanf("%d", &info[i]);
+    }
+
+    edge_len = n - 1;
+    for (int i = 0; i < edge_len; i++) {
+        scanf("%d %d", &edges[i][0], &edges[i][1]);
+    }
+
+
+    do_run();
+    do_print();
+}
+
+void do_run() {
+    reset_state();
+
+    for (int i = 0; i < edge_len; i++) {
+        int from = edges[i][0];
+        int to   = edges[i][1];
+
+        graph[from][graph_cnt[from]++] = to;
+    }
+
+    dfs(0, 0, 0);
+}
+
+void do_print() {
+    printf("%d\n", max_sheep);
+}
+
+void reset_state() {
+    max_sheep = 0;
+
+    for (int i = 0; i < 18; i++) {
+        graph_cnt[i] = 0;
+        visited[i] = 0;
+    }
+}
+
+void dfs(int node, int sheep, int wolf) {
+    visited[node] = 1;
+    if (info[node] == 0)
+        sheep++;
+    else
+        wolf++;
+
+    // 늑대가 같, 많아지면 중단
+    if (wolf >= sheep) {
+        visited[node] = 0;
+        return;
+    }
+
+    // 최대 양 수 업데이트
+    if (sheep > max_sheep)
+        max_sheep = sheep;
+
+    // 탐색진행
+    for (int i = 0; i < n; i++) {
+        if (visited[i]) {
+            for (int j = 0; j < graph_cnt[i]; j++) {
+                int next = graph[i][j];
+                if (!visited[next]) {
+                    dfs(next, sheep, wolf);
+                }
+            }
+        }
+    }
+    visited[node] = 0;
+}

minyoung/끝말잇기.c

@@ -0,0 +1,101 @@
+#include <stdio.h>
+#include <string.h>
+
+int n;
+int words_len;
+char words[101][51];
+char used[101][51];
+int used_cnt = 0;
+int out_person = 0;
+int out_turn = 0;
+
+void do_run();
+void do_print();
+void reset_state();
+int is_duplicate(char *word);
+int is_invalid_link(char *prev, char *cur);
+
+int main() {
+
+    scanf("%d", &n);
+    scanf("%d", &words_len);
+
+    for (int i = 0; i < words_len; i++) {
+        scanf("%s", words[i]);
+    }
+
+    do_run();
+    do_print();
+}
+
+void do_run() {
+    reset_state();
+
+    char prev[51] = "";
+    for (int i = 0; i < words_len; i++) {
+
+        int person = (i % n) + 1;
+        int turn = (i / n) + 1;
+
+        // 한 글자 단어 체크
+        if (strlen(words[i]) < 2) {
+            out_person = person;
+            out_turn = turn;
+            return;
+        }
+
+        // 중복인지 확인
+        if (is_duplicate(words[i])) {
+            out_person = person;
+            out_turn = turn;
+            return;
+        }
+
+        // 끝말잇기 계속 가능한지 확인
+        if (i > 0 && is_invalid_link(prev, words[i])) {
+            out_person = person;
+            out_turn = turn;
+            return;
+        }
+
+        // 정상일때
+        strcpy(used[used_cnt], words[i]);
+        used_cnt++;
+        strcpy(prev, words[i]);
+    }
+}
+
+void do_print() {
+    printf("%d %d\n", out_person, out_turn);
+}
+
+// 초기화
+void reset_state() {
+    used_cnt = 0;
+    out_person = 0;
+    out_turn = 0;
+
+    for (int i = 0; i < 101; i++) {
+        used[i][0] = '\0';
+    }
+}
+
+// 중복인지 확인 함수
+int is_duplicate(char *word) {
+    for (int i = 0; i < used_cnt; i++) {
+        if (strcmp(used[i], word) == 0)
+            return 1;
+    }
+    return 0;
+}
+
+// 끝말잇기 연결 검사
+int is_invalid_link(char *prev, char *cur) {
+    int len = strlen(prev);
+    char last = prev[len -1];
+    char first = cur[0];
+
+    if (last != first)
+        return 1;
+    return 0;
+}