终于要开始系统的做题了。
诶 还是太水了 希望一个暑假过后能够有大的飞跃吧
好好做题 天天向上！
废话不多说，贴上《算法竞赛入门经典》 刘汝佳 题目的代码吧
AOAPC
I: Beginning Algorithm Contests (Rujia Liu) :: Volume
0. Getting Started
10055 - Hashmat
the Brave Warrior
一开始给wa了。。没有注意到a，b应该用long int类型
#include<iostream>
#include<cstring>
#include<cstdio>
using namespace std;
int main ()
{
long int a,b;
while (scanf("%ld%ld",&a,&b)!=EOF)
{
if (a<b)
printf("%ld\n",b-a);
else
printf("%ld\n",a-b);
}
return 0;
}
10071 - Back
to High School Physics
#include<iostream>
#include<cstdio>
using namespace std;
int main ()
{
int v,t;
while (cin>>v>>t)
cout<<v*t*2<<endl;
return 0;
}
#include<iostream>
#include<cstdio>
using namespace std;
int main ()
{
int t,f,a,b,c,s;
cin>>t;
while (t--)
{
cin>>f;
int i;
s=0;
for (i=0; i<f; i++)
{
scanf("%d%d%d",&a,&b,&c);
s+=a*c;
}
cout<<s<<endl;
}
return 0;
}
#include<iostream>
#include<cstring>
#include<cstdio>
using namespace std;
char str[10000];
int main ()
{
while (gets(str))
{
int len=strlen(str);
int i;
for (i=0; i<len; i++)
printf("%c",str[i]-7);
cout<<endl;
}
return 0;
}
494 - Kindergarten
Counting Game
#include<iostream>
#include<cstdio>
#include<cstring>
#include<ctype.h>
using namespace std;
char str[10000];
int main ()
{
while (gets(str))
{
int len=strlen(str);
int i,s=0,k=-1,t=-1;
for (i=0; i<len; i++)
{
if (isalpha(str[i]))
{
if (t==-1)
{
s++;
t=1;
}
continue;
}
else
t=-1;
}
cout<<s<<endl;
}
}
#include<iostream>
#include<cstdio>
#include<cstring>
using namespace std;
char str[1000];
int main ()
{
int t,j,i;
while (cin>>t)
{
int s=0,x=0,min=1000;
getchar();
if (t==0) break;
for (j=0; j<t; j++)
{
x=0;
gets(str);
int len=strlen(str);
for (i=0; i<len; i++)
{
if (str[i]==' ')
{
s++;
x++;
}
}
if (x<min) min=x;
}
cout<<s-min*t<<endl;
}
return 0;
}
不停的在wa，没有发现当输出时，如果后续没有字符。就直接回行，不需要用空格填充。
而且之前以为是多case的。UVa描述不清楚
#include<iostream>
#include<cstdio>
#include<cstring>
using namespace std;
int main ()
{
char str[110][110];
int n=0,max=0;
while (gets(str[n++]))
{
if (str[n-1][0]==0) break;
if (max<strlen(str[n-1])) max=strlen(str[n-1]);
}
int i,j;
for (j=0; j<max; j++)
{
for (i=n-2; i>=0; i--)
if (j<strlen(str[i])) cout<<str[i][j];
else cout<<" ";
cout<<endl;
}
return 0;
}
原来是输入一句输出一句。一开始以为是要整篇文章输入之后再输出。给wa了好多次。。。
#include<iostream>
#include<cstdio>
#include<cstring>
#include<ctype.h>
using namespace std;
int main ()
{
char st[150];
int i,j,m=0,n=0,max=0;
while(gets(st))
{
if (st[0]!='\0')
{
int len=strlen(st),s;
for (i=0,s=0; i<len; i++)
{
if (isdigit(st[i])) s+=st[i]-'0';
else if (st[i]=='!') cout<<endl;
else
while(s>0)
{
if (st[i]=='b') cout<<" ";
else cout<<st[i];
s--;
}
}
}
cout<<endl;
}
return 0;
}
要注意输出的格式，每个case之间才有空行。。
#include<iostream>
#include<cstdio>
#include<cstring>
#include<cmath>
using namespace std;
int main ()
{
int t,am,fr,i,j;
cin>>t;
while (t--)
{
cin>>am>>fr;
while (fr--)
{
for (i=1; i<=am; i++)
{
for (j=1; j<=i; j++)
cout<<i;
cout<<endl;
}
for (i=am-1; i>=1; i--)
{
for (j=1; j<=i; j++)
cout<<i;
cout<<endl;
}
if (fr>=1) cout<<endl;
}
if (t>=1) cout<<endl;
}
return 0;
}
#include<iostream>
#include<cstdio>
#include<cstring>
#include<cmath>
using namespace std;
int main ()
{
int n,i,j;
char word[100],alpha[100];
int visited[30];
while (cin>>n)
{
if (n==-1) break;
cin>>word>>alpha;
int s=0,k=0;
memset(visited,0,sizeof(visited));
int len=strlen(alpha),LEN=strlen(word);
for (i=0; i<len; i++)
if (visited[alpha[i]-'a']==0)
{
if (strchr(word,alpha[i])!=NULL)
{
for (j=0; j<LEN; j++)
if (word[j]==alpha[i]) k++;
visited[alpha[i]-'a']=1;
}
else s++;
if (k==LEN || s==7) break;
}
cout<<"Round "<<n<<endl;
if (k<LEN && s==7) cout<<"You lose."<<endl;
if (k==LEN && s<7) cout<<"You win."<<endl;
if (k<LEN && s<7) cout<<"You chickened out."<<endl;
}
}
一开始用int给wa了。因为当数字大于int的最大值之后，返回的是一个任意数，有可能是负数。就死循环了
所以必须用long int
#include<iostream>
#include<cstdio>
#include<cstring>
#include<cmath>
using namespace std;
int main ()
{
long int a,l,n,t=0;
while (cin>>a>>l)
{
t++;
n=a;
int s=0;
if (a==-1 && l==-1) break;
while(a!=1)
{
if (a%2) a=3*a+1;
else a=a/2;
s++;
if (a>l) break;
}
if (a==1 && n!=1) s++;
printf("Case %d: A = %ld, limit = %ld, number of terms = %ld\n",t,n,l,s);
}
return 0;
}
457 - Linear
Cellular Automata
万恶的英语。。看不懂题意啊。。
其实就是算出左右和自己相加之后的值，然后通过dna这个数组得到一个新的值
#include<iostream>
#include<cstring>
#include<cstdio>
using namespace std;
int main ()
{
int i,j,t,dna[15],dish[50],dish2[50];
cin>>t;
while(t--)
{
memset(dna,0,sizeof(dna));
memset(dish,0,sizeof(dish));
memset(dish2,0,sizeof(dish2));
for (i=0; i<10; i++)
cin>>dna[i];
dish[20]=1;
for (i=1; i<=50; i++)
{
for (j=1; j<=40; j++)
{
switch(dish[j])
{
case 0:
cout<<" ";
break;
case 1:
cout<<".";
break;
case 2:
cout<<"x";
break;
case 3:
cout<<"W";
}
dish2[j]=dish[j];
}
cout<<endl;
for (j=1; j<=40; j++)
{
int temp=dish2[j]+dish2[j-1]+dish2[j+1];
dish[j]=dna[temp];
}
}
if (t>=1) cout<<endl;
}
return 0;
}