hdu 2023wrong answer!
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#include<iostream>
using namespace std;
int main()
int n,m,g=0;
bool t=true;
float s;
cin>>n>>m;
float *a=new float[n*m];
float *b=new float[n];
float *c=new float[m];
for(int i=0;i<n*m;i++)
cin>>a[i];
for(i=0,s=0;i<m;i++)
for(int j=i;j<n*m;j+=m)
s+=a[j];
c[i]=s/m;
s=0;
for(i=0,s=0;i<n;i++)
for(int j=0;j<m;j++)
s+=a[i*m+j];
if(a[i*m+j]>c[j])
t=false;
if(t)
g++;
else
t=true;
b[i]=s/m;
s=0;
delete []a;
for(i=0;i<n;i++)
printf("%.2f",b[i]);
if(i==n-1)
cout<<endl;
else
cout<<" ";
delete []b;
for(i=0;i<m;i++)
printf("%.2f",c[i]);
if(i==m-1)
cout<<endl;
else
cout<<" ";
delete []c;
cout<<g<<endl;
return 0;
#include"stdio.h"
int main()
int n,m;
int num[60][6];
double ave1[60],ave2[6];
int i,j;
int z;
while(scanf("%d%d",&n,&m)!=EOF)
for(i=0;i<n;i++)
ave1[i]=0;
for(j=0;j<m;j++)
scanf("%d",&num[i][j]);
ave1[i]+=num[i][j];
ave1[i]/=m;
for(i=0;i<n-1;i++)
printf("%0.2lf ",ave1[i]);
printf("%0.2lf\n",ave1[n-1]);
for(j=0;j<m;j++)
ave2[j]=0;
for(i=0;i<n;i++)
ave2[j]+=num[i][j];
ave2[j]/=n;
printf("%0.2lf",ave2[j]);
if(j!=m-1) printf(" ");
printf("\n");
for(i=0,z=0;i<n;i++)
for(j=0;j<m;j++)
if(num[i][j]<ave2[j])
break;
if(j==m)
z++;
printf("%d\n",z);
printf("\n");
return 0;
参考技术B 1、这题是多case~
你的程序只能处理单组数据,但实际上题目是多组数据连续写在一起的~
2、c[i]=s/m;
这里算平均成绩应该是除以人数嘛。。。改成c[i]=s/n;
3、if(a[i*m+j]>c[j])
你的意思是若有一个小于则不符合。但是,这个小于的方向错了。。。- -
4、输出格式改成0.2f试试。。。
hdu 3038 How Many Answers Are Wrong (带权并查集)
How Many Answers Are Wrong
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)
Total Submission(s): 14876 Accepted Submission(s): 5237
FF is a bad boy, he is always wooing TT to play the following game with him. This is a very humdrum game. To begin with, TT should write down a sequence of integers-_-!!(bored).
Then, FF can choose a continuous subsequence from it(for example the subsequence from the third to the fifth integer inclusively). After that, FF will ask TT what the sum of the subsequence he chose is. The next, TT will answer FF‘s question. Then, FF can redo this process. In the end, FF must work out the entire sequence of integers.
Boring~~Boring~~a very very boring game!!! TT doesn‘t want to play with FF at all. To punish FF, she often tells FF the wrong answers on purpose.
The bad boy is not a fool man. FF detects some answers are incompatible. Of course, these contradictions make it difficult to calculate the sequence.
However, TT is a nice and lovely girl. She doesn‘t have the heart to be hard on FF. To save time, she guarantees that the answers are all right if there is no logical mistakes indeed.
What‘s more, if FF finds an answer to be wrong, he will ignore it when judging next answers.
But there will be so many questions that poor FF can‘t make sure whether the current answer is right or wrong in a moment. So he decides to write a program to help him with this matter. The program will receive a series of questions from FF together with the answers FF has received from TT. The aim of this program is to find how many answers are wrong. Only by ignoring the wrong answers can FF work out the entire sequence of integers. Poor FF has no time to do this job. And now he is asking for your help~(Why asking trouble for himself~~Bad boy)
Line 2..M+1: Line i+1 contains three integer: Ai, Bi and Si. Means TT answered FF that the sum from Ai to Bi is Si. It‘s guaranteed that 0 < Ai <= Bi <= N.
You can assume that any sum of subsequence is fit in 32-bit integer.
#include <cstdio> using namespace std; const int maxn=200000; struct { int fa; int rel;//保存和其父亲节点前缀和的差值 }father[maxn+10]; int finding(int x) { if(father[x].fa==x) return x; int tmp=father[x].fa; father[x].fa=finding(tmp); father[x].rel=father[x].rel+father[tmp].rel;//更新关系 return father[x].fa; } int main() { int n,m; while(scanf("%d%d",&n,&m)!=EOF) { for(int i=0;i<=n;i++)//0..n而不是1..n(尽管点的编号是1..n) { father[i].fa=i; father[i].rel=0; } int ans=0; while(m--) { int a,b,s; scanf("%d%d%d",&a,&b,&s); a--;//这点文中已经有解释了 int aroot=finding(a); int broot=finding(b); if(aroot==broot) { if(father[b].rel-father[a].rel!=-s) ans++; } else { father[aroot].fa=broot; father[aroot].rel=-father[a].rel+father[b].rel+s; } //printf("%d ",ans); } printf("%d ",ans); } return 0; }
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