Li zhiguo

第2章暴力破解/2.2模拟/3.其他模拟/2-10手机键盘.cpp

@@ -1,21 +1,24 @@
 #include<iostream>
-
+#include<string.h>
 using namespace std;
-int keytab[26]= {1,2,3,1,2,3,1,2,3,1,2,3,1,2,3,1,2,3,4,1,2,3,1,2,3,4};
+int keytab[26]= {
+    1,2,3,1,2,3,
+    1,2,3,1,2,3,1,2,3,
+    1,2,3,4,1,2,3,1,2,3,4
+};
 
 int main() {
-    char words[100]= {'\0'};
-    while(scanf("%s",words)!=EOF) {
+    string str;
+    while(cin>>str) {
         int time=0;
-        int i=0;
-        char temp=words[i++];
-        while(temp!='\0') {
-            //�Ƿ���һ��������
-            if((words[i]-temp)==(keytab[words[i]-'a']-keytab[temp-'a'])) {
+        char temp;
+        for(int i=0; i<str.size(); i++) {
+            time+=keytab[str[i]-'a'];
+            //������ֵ������ĸ��ֵ����һ��������
+            if(i>0&&(str[i]-temp)==(keytab[str[i]-'a']-keytab[temp-'a'])) {
                 time+=2;
             }
-            time+=keytab[temp-'a'];
-            temp=words[i++];
+            temp=str[i];
         }
         printf("%d\n",time);
     }

第2章暴力破解/2.2模拟/3.其他模拟/2-11XXX定律.cpp

@@ -1,7 +1,5 @@
 #include<iostream>
-
 using namespace std;
-
 int main() {
     int n;
     while(scanf("%d",&n)!=EOF) {

第2章暴力破解/2.2模拟/3.其他模拟/2-9剩下的树.cpp

@@ -1,25 +1,29 @@
 #include<iostream>
-
 using namespace std;
-
 const int MAXL=10001;
-//bool������ģ����·������false��û��true
+//bool������ģ����·
 bool road[MAXL];
 
 int main() {
     int l,m;
-    while(scanf("%d %d",&l,&m)!=EOF) {
-        int trees=l+1;
-        while(m--) {
-            int left,right;
-            scanf("%d %d",&left,&right);
-            for(int i=left; i<=right; ++i) {
-                if(!road[i]) {
-                    road[i]=true;
-                    trees--;
+    while(scanf("%d%d",&l,&m)!=EOF) {
+        int left,right,trees=0;
+        for(int i=0; i<=l; i++) {
+            road[i]=true;
+        }
+        for(int i=0; i<m; i++) {
+            scanf("%d%d",&left,&right);
+            for(int j=left; j<=right; j++) {
+                if(road[j]) {
+                    road[j]=false;
                 }
             }
         }
+        for(int i=0; i<=l; i++) {
+            if(road[i]) {
+                trees++;
+            }
+        }
         printf("%d\n",trees);
     }
     return 0;

第3章排序与查找/3.2查找/3-5查找.cpp

@@ -1,19 +1,16 @@
 #include<iostream>
 #include<algorithm>
-
 using namespace std;
-
-//���ֲ���
 bool BinarySearch(int n,int target,int num[]) {
     int left=0,right=n-1;
     while(left<=right) {
         int middle=(left+right)/2;
-        if(num[middle]<target) {
-            left=middle+1;
-        } else if(num[middle]>target) {
+        if(target==num[middle]) {
+            return true;
+        } else if(target<num[middle]) {
             right=middle-1;
         } else {
-            return true;
+            left=middle+1;
         }
     }
     return false;

第3章排序与查找/3.2查找/test3-5找最小数.cpp

@@ -7,18 +7,17 @@ struct Point {
 };
 const int MAXN=1001;
 Point point[MAXN];
-bool mycompare(Point a,Point b){
-    if(a.x==b.x){
+bool mycompare(Point a,Point b) {
+    if(a.x==b.x) {
         return a.y<b.y;
-    }else{
+    } else {
         return a.x<b.x;
     }
 }
 int main() {
     int n;
-    while(scanf("%d",&n)!=EOF){
-
-        for(int i=0;i<n;i++){
+    while(scanf("%d",&n)!=EOF) {
+        for(int i=0; i<n; i++) {
             scanf("%d %d",&point[i].x,&point[i].y);
         }
         sort(point,point+n,mycompare);

第3章排序与查找/3.2查找/test3-7找位置.cpp

@@ -6,21 +6,20 @@ int main() {
     string str;
     while(cin>>str) {
         for(int i=0; i<str.size(); i++) {
-            bool first=false;//�ظ��ַ��ĵ�һ�γ���
+            bool isFirst=false;
+            //�����ĸ�ѱ���
             if(str[i]=='*')continue;
             for(int j=i+1; j<str.size(); j++) {
                 if(str[i]==str[j]) {
-                    if(!first) {
-                        printf("%c:%d",str[i],i);
-                        first=true;
+                    if(!isFirst) {
+                        printf("%c:%d",str[j],i);
+                        isFirst=true;
                     }
                     printf(",%c:%d",str[j],j);
-                    str[j]='*';
+                    str[j]='*';//�ѱ���
                 }
             }
-            if(first) {
-                printf("\n");
-            }
+            if(isFirst)printf("\n");
         }
     }
     return 0;