20250528 baekjoon C

code_study/Baekjoon/c/1316.c

@@ -0,0 +1,30 @@
+#include <stdio.h>
+
+int main(){
+    int cnt=0, flag, n;
+    scanf("%d",&n);
+
+    char s[101];
+    while(n--){
+        int chk[26] = {0,};
+        flag=0;
+        scanf("%s",s);
+        for(int i=0; s[i]!='\0'; i++){
+            if(chk[s[i]-'a']){
+                flag=1;
+                break;
+            }
+            if(s[i]!=s[i+1]){
+                chk[s[i]-'a']=1;
+            }
+        }
+        if(!flag){
+            cnt++;
+        }
+    }
+
+    printf("%d",cnt);
+
+    return 0;
+
+}

code_study/Baekjoon/c/25206.c

@@ -0,0 +1,34 @@
+#include <stdio.h>
+
+int main(){
+    char sub[51];
+    char rank[3];
+    float credit, sum_credit=0, sum_rank=0;
+    int n=20;
+
+    while(n--){
+        scanf("%s %f %s",sub,&credit,rank);
+        if(rank[0]!='P'){
+            if(rank[0]=='A'){
+                if(rank[1]=='+'){ sum_rank += credit*4.5; }
+                else{ sum_rank += credit*4.0; }
+            }
+            else if(rank[0]=='B'){
+                if(rank[1]=='+'){ sum_rank += credit*3.5; }
+                else{ sum_rank += credit*3.0; }
+            }
+            else if(rank[0]=='C'){
+                if(rank[1]=='+'){ sum_rank += credit*2.5; }
+                else{ sum_rank += credit*2.0; }
+            }
+            else if(rank[0]=='D'){
+                if(rank[1]=='+'){ sum_rank += credit*1.5; }
+                else{ sum_rank += credit*1.0; }
+            }
+            sum_credit+=credit;
+        }
+    }
+    printf("%.6f",sum_rank/sum_credit);
+
+    return 0;
+}

code_study/Baekjoon/c/2941.c

@@ -0,0 +1,31 @@
+#include <stdio.h>
+
+int main(){
+    char s[101];
+    scanf("%s",s);
+
+    int cnt=0, i=0;
+    while(s[i]!='\0'){
+        if(s[i]=='d' && s[i+1]=='z' && s[i+2]=='='){
+            i+=3;
+        }
+        else if(
+            s[i]=='c' && s[i+1]=='=' || s[i+1]=='-' ||
+            s[i]=='d' && s[i+1]=='-' ||
+            s[i]=='l' && s[i+1]=='j' ||
+            s[i]=='n' && s[i+1]=='j' ||
+            s[i]=='s' && s[i+1]=='=' ||
+            s[i]=='z' && s[i+1]=='='
+        ){
+            i+=2;
+        }
+        else{
+            i++;
+        }
+        cnt++;
+    }
+
+    printf("%d",cnt);
+
+    return 0;
+}