A题:
 判断>2的偶数;
B题:(回溯)
#include <iostream>
#include<string>
#include<cstring>
#include<cstdio>
#include<cmath>
#include<map>
#include<cctype>
using namespace std;
int days,times;
int xt1[1000],xt2[1000];
int sum,i,j,k;
int a[1000];
int main()
{
    cin>>days>>times;
 
    for(i=1;i<=days;i++)
     {
         cin>>xt1[i]>>xt2[i];
     }
    for(i=1;i<=days;i++)
          a[i]=xt1[i];
    while(1)
    {
        sum=0;
        for(i=1;i<=days;i++)
         sum+=a[i];
        if(sum==times)
        {
            cout<<"YES"<<endl;
            for(i=1;i<=days;i++)
              cout<<a[i]<<' ';
            cout<<endl;
            break;
        }
        i=1;
        while(a[i]==xt2[i]&&i<=days)i++;
         if(i>days)
         {
             cout<<"NO"<<endl;
             break;
         }
         a[i]++;
 
 
 
 
    }
}

C题:(模拟)

#include<iostream>
#include<string>
#include<cstring>
#include<cstdio>
#include<cmath>
#include<stack>
#include<algorithm>
using namespace std;
int n,i,j,k;
string a[100001];
string str;
int b[100001];
int main()
{
    cin>>n;
    memset(b,0,sizeof(b));
    int k=1;
    for(i=1;i<=n;i++)
     {
 
        cin>>a[k];
        getchar();
        int gs=1;
        for(j=1;j<k;j++)
         {
             if(a[k]==a[j])//重复不存
               {
                   gs=0;
                   b[j]++;//标记数组
                   str=a[k];
                   a[k]="";
                   break;
               }
         }
        if(gs==0)
         cout<<str<<b[j]<<endl;
        else
        {
            cout<<"OK"<<endl;
            k++;
        }
 
     }
    return 0;
}

 

D题:(动态规划)

#include<iostream>

#include<string>

#include<cstring>

#include<cstdio>

#include<cmath>

#include<stack>

#include<algorithm>

using namespace std;

int n,wi,hi;

struct  node

{

  int w;

  int h;

  int fs;//标记位置

}wh[6005];

int i,j,kl,k;

int dp[6001];

int sum[6001];

int a[6001];

bool cmp(node a,node b)

{

    if(a.w<b.w)

      return true;

    if(a.w>b.w)

      return false;

    if(a.w==b.w)

    {

      if(a.h<b.h)

      return true;

      if(a.h>=b.h)

     return false;

    }

}

int main()

{

    cin>>n>>wi>>hi;

    k=1;

    for(i=1;i<=n;i++)

     {

         cin>>wh[k].w>>wh[k].h;

         if(wh[k].w>wi&&wh[k].h>hi)(切掉不满足条件的)

         {

            wh[k].fs=i;

             k++;

         }

 

     }

     if(k==1&&(wh[1].w<=wi||wh[1].h<=hi))

     {

 

         cout<<'0'<<endl;

         return 0;

     }

     //for(i=1;i<k;i++)

     // cout<<wh[i].w<<' '<<wh[i].h<<' '<<wh[i].fs<<endl;

    sort(wh+1,wh+k,cmp);

     memset(dp,0,sizeof(dp));

    for(i=1;i<k;i++)

     {

         for(j=1;j<i;j++)

         {

            if(wh[i].w>wh[j].w&&wh[i].h>wh[j].h)

            if(dp[i]<dp[j]+1)

             {

                 dp[i]=dp[j]+1;

                 sum[i]=j;//记录路径,把前后路径接在一起

             }

         }

     }

     int max1=-1,max0;

     for(i=1;i<k;i++)//再次扫描

     {

         if(max1<dp[i])

           {

               max1=dp[i];

               max0=i;

            }

     }

     cout<<max1+1<<endl;//由于刚开始为0,最后要加1

    i=max0;

    int ks=0;

    while(1)

    {

       a[ks++]=wh[i].fs;//数组a转移地址

        i=sum[i];

        if(i<=0)

         break;

    }

    for(i=ks-1;i>=0;i–)//输出地址fs

     cout<<a[i]<<' ';

    cout<<endl;

    return 0;

 

}

E题:

 #include<iostream>

#include<string>
#include<cstring>
#include<cstdio>
#include<cmath>
#include<algorithm>
#include<stack>
#include<cctype>
#include<queue>
#include<vector>
using namespace std;
int a[5];
int i,j;
 
 
int main()
{
   for(i=1;i<=4;i++)
    cin>>a[i];
   int glag[5]={0};//标记数组
   //判断
    if(abs(a[1]-a[2])<a[3]&&(a[1]+a[2])>a[3])
      glag[1]=1;
    if((a[1]+a[2])==a[3]||(a[1]+a[3])==a[2]||(a[2]+a[3])==a[1])glag[1]=2;
    if(abs(a[1]-a[2])<a[4]&&(a[1]+a[2])>a[4])
      glag[2]=1;
    if((a[1]+a[2])==a[4]||(a[1]+a[4])==a[2]||(a[2]+a[4])==a[1])glag[2]=2;
    if(abs(a[1]-a[4])<a[3]&&(a[1]+a[4])>a[3])
      glag[3]=1;
    if((a[1]+a[4])==a[3]||(a[1]+a[3])==a[4]||(a[4]+a[3])==a[1])glag[3]=2;
    if(abs(a[4]-a[2])<a[3]&&(a[4]+a[2])>a[3])
      glag[4]=1;
    if((a[4]+a[2])==a[3]||(a[4]+a[3])==a[2]||(a[2]+a[3])==a[4])glag[4]=2;
    int gs1=0;
    int gs2=0;
    int gs0=0;
    for(i=1;i<=4;i++)//输出结果
    {
        if(glag[i]==1)
        {
            cout<<"TRIANGLE"<<endl;
            gs1=1;
            break;
        }
        if(glag[i]==2)
         {
             gs2=1;
         }
    }
    if(gs2==1&&gs1==0)
      cout<<"SEGMENT"<<endl;
    if(gs2==0&&gs1==0)
      cout<<"IMPOSSIBLE"<<endl;
 
    return 0;
}
F题:
#include<iostream>
#include<string>
#include<cstring>
#include<cstdio>
#include<cmath>
#include<cctype>
#include<stack>
#include<algorithm>
using namespace std;
int n,m,i,j;
char c;
char str[1000][1000];
int  sum[1000]={0};
int main()
{
  cin>>n>>m;
  getchar();
  cin>>c;
  int   k=0;
  for(i=1;i<=n;i++)
  {
   for(j=1;j<=m;j++)
   {
       cin>>str[i][j];
   }
   getchar();
  }
 
 for(i=1;i<=n;i++)
  for(j=1;j<=m;j++)
   {
    if(str[i][j]==c)
      {
       if(isupper(str[i][j+1])&&(j+1)<=m)
        {
            int mc=str[i][j+1]-'A';
            sum[mc]++;//标记
        }
       if(isupper(str[i][j-1])&&(j-1)>=1)
        {
            int mc=str[i][j-1]-'A';
              sum[mc]++;
 
        }
        if(isupper(str[i+1][j])&&(i+1)<=n)
          {
              int mc=str[i+1][j]-'A';
              sum[mc]++;
          }
        if(isupper(str[i-1][j])&&(i-1)>=1)
         {
             int mc=str[i-1][j]-'A';
             sum[mc]++;
         }
     }
 
 
    }
 
    int s=0;
    for(i=0;i<26;i++)
     {
         if(sum[i]&&i!=c-'A')
          s++;
     }
 
  cout<<s<<endl;
  return 0;
}
 

G题:

#include<iostream>
#include<string>
#include<cstring>
#include<cstdio>
#include<cmath>
#include<algorithm>
#include<stack>
#include<cctype>
#include<queue>
#include<vector>
using namespace std;
long  a[100005];
int i,j,n;
long  sum1;
long sum2;
long sum,p,q;
int ans1,ans2;
int main()
{
    cin>>n;
    sum=0;
  for(i=1;i<=n;i++)
   {
       cin>>a[i];
       sum+=a[i];
    }
  p=1;q=n;//指针标记
  sum1=0;//记录所吃的量
  sum2=0;
  ans1=0;//记录块数
  ans2=0;
  while(p<=q)
  {
        while(p<=q&&sum1<=sum2)
          {
 
 
             sum1+=a[p];
                 p++;
             ans1++;
 
           }
        while(p<=q&&sum1>sum2)
           {
 
              sum2+=a[q];
               q--;
              ans2++;
 
           }
 
  }
  //cout<<p<<' '<<q<<endl;
  //cout<<sum1<<' '<<sum2<<endl;
  cout<<ans1<<' '<<ans2<<endl;
    return 0;
}

      

转载于:https://www.cnblogs.com/sdau–codeants/p/3234151.html