zufe17届程序设计竞赛总结

本文提供了多道编程题目的解决方案,涵盖了基本的输入输出操作、简单的数学运算、字符串处理及简单的算法应用等内容,适合编程初学者练习。

1~8题全是水题,话不多说,直接上代码;

#include<iostream>
#include<iomanip>
#include<cstdio>
#include<string>
#include<string.h>
#include<algorithm>
#include<queue>
#include<stack>
#include<functional>
#include<cmath>
using namespace std;
int main()
{
    int T;
    cin>>T;
    while(T--)
    {
        int n;cin>>n;
        if(n<0)
            cout<<"-1";
        else if(n==0) cout<<0;
        else cout<<1;
        cout<<endl;
    }
    return 0;
}

#include<iostream>
#include<iomanip>
#include<cstdio>
#include<string>
#include<string.h>
#include<algorithm>
#include<queue>
#include<stack>
#include<functional>
#include<cmath>
using namespace std;
int main()
{
    int T;
    cin>>T;
    while(T--)
    {
        int n;cin>>n;
        cout<<2*n<<endl;
    }
    return 0;
}

#include<iostream>
#include<iomanip>
#include<cstdio>
#include<string>
#include<string.h>
#include<algorithm>
#include<queue>
#include<stack>
#include<functional>
#include<cmath>
using namespace std;
int main()
{
    int T;
    cin>>T;
    while(T--)
    {
        int n;cin>>n;
        cout<<'2';
        for(int i=1;i<=n;i++)
            cout<<'3';
        cout<<endl;
    }
    return 0;
}

#include<iostream>
#include<iomanip>
#include<cstdio>
#include<string>
#include<string.h>
#include<algorithm>
#include<queue>
#include<stack>
#include<functional>
#include<cmath>
using namespace std;
int main()
{
    int T;
    cin>>T;
    while(T--)
    {
        int n,m;cin>>n>>m;
        cout<<m*n<<endl;
        for(int i=1;i<=n;i++)
        {
            for(int j=1;j<=m;j++)
            {
                if(i%2==1)
                {
                    if(j%2==1)
                        cout<<'*';
                    else cout<<'-';
                }
                else
                {
                    if(j%2==1)
                        cout<<'-';
                    else
                        cout<<'*';
                }
            }
            cout<<endl;
        }
 
    }
    return 0;
}

#include<iostream>
#include<iomanip>
#include<cstdio>
#include<string>
#include<string.h>
#include<algorithm>
#include<queue>
#include<stack>
#include<functional>
#include<cmath>
using namespace std;
int main()
{
    int T;
    cin>>T;
    while(T--)
    {
        int sum=0;
        int n,k;cin>>n>>k;
        for(int i=1;i<=n;i++)
        {
            int t;cin>>t;int s=0;
            while(t>0)
            {
                t=t/k;
                s++;
            }
            sum=sum+s;
        }
        cout<<sum<<endl;
    }
    return 0;
}
 
这题压根不用转,直接算;


#include<iostream>
#include<iomanip>
#include<cstdio>
#include<string>
#include<string.h>
#include<algorithm>
#include<queue>
#include<stack>
#include<functional>
#include<cmath>
using namespace std;
int main()
{
    int T;
    cin>>T;
    while(T--)
    {
        int n;cin>>n;
        int a[55];int c=0;
        for(int i=1;i<=n;i++)
        {
            int t;cin>>t;
            bool b=0;
            if(t<2) b=1;
            for(int j=2;j<t;j++)
            {
                if(t%j==0)
                {
                    b=1;break;
                }
            }
            if(b==0)
            {
                a[c]=t;c++;
            }
        }
        sort(a,a+c); int s=0;
        for(int i=0;i<c;i++)
        {
            for(int j=i+1;j<c;j++)
            {
                for(int k=j+1;k<c;k++)
                {
                    if(i==j||i==k||j==k) continue;
                    if(a[i]+a[j]>a[k]) s++;
                }
            }
        }
        cout<<s<<endl;
    }
    return 0;
}

#include<iostream>
#include<iomanip>
#include<cstdio>
#include<string>
#include<string.h>
#include<algorithm>
#include<queue>
#include<stack>
#include<functional>
#include<cmath>
using namespace std;
int main()
{
    int T;
    cin>>T;
    while(T--)
    {
        int n,m;cin>>n>>m;
        char a[101];
        for(int i=1;i<=n;i++)
            cin>>a[i];
        bool q=0;
        for(int i=1;i<=n-m+1;i++)
        {
            if(a[i]==a[i+m-1])
            {
                bool b=0;
                for(int j=i,k=i+m-1;j<k;j++,k--)
                {
                    if(a[j]!=a[k])
                    {
                        b=1;break;
                    }
                }
                if(b==0)
                {
                    cout<<"YES";q=1;break;
                }
            }
        }
        if(q==0) cout<<"NO";
        cout<<endl;
    }
    return 0;
}
 
 
 

#include<iostream>
#include<iomanip>
#include<cstdio>
#include<string>
#include<string.h>
#include<algorithm>
#include<queue>
#include<stack>
#include<functional>
#include<cmath>
using namespace std;
int main()
{
    int T;cin>>T;
    while(T--)
    {
        int n,k;cin>>n>>k;
        int h[1002],w[1002];
        for(int i=0;i<n;i++)
            cin>>h[i];
        for(int i=0;i<n;i++)
            cin>>w[i];
        int a[1002];
        for(int i=0;i<n;i++)
            a[i]=h[i]-w[i];
        sort(a,a+n); int x1=0,x2=0;
        for(int i=0;i<k;i++)
        {
            x1=x1+a[i];
        }
        for(int i=n-1;i>=n-k;i--)
            x2=x2+a[i];
        x1=abs(x1);x2=abs(x2);
        cout<<max(x1,x2)<<endl;
    }
    return 0;
}

 
#include<iostream>
#include<iomanip>
#include<cstdio>
#include<string>
#include<string.h>
#include<algorithm>
#include<queue>
#include<stack>
#include<functional>
#include<cmath>
using namespace std;
int main()
{
    int T;
    cin>>T;
    while(T--)
    {
        long long a[1002],b[1002];
        int n;cin>>n;
        for(int i=1;i<=n;i++)
            cin>>a[i];
        bool t=0;
        long long c[1002];
        for(int i=1;i<=n;i++)
        {
            cin>>b[i];if(b[i]<a[i]) t=1;
            c[i]=b[i]-a[i];
        }
        if(t==1)
        {
            cout<<"NO"<<endl;continue;
        }
        long long sum=0;c[0]=0;
        for(int i=1;i<=n;i++)
        {
            if(c[i]>c[i-1]) sum=sum+c[i]-c[i-1];
        }
        cout<<sum<<endl;
    }
    return 0;
}
 

#include<iostream>
#include<string>
#include<cmath>
#include<string.h>
#include<algorithm>
int a[1002][1002], b[1002][1002];
using namespace std;
int main()
{
    int T; cin >> T;
    while (T--)
    {
        int n, m; cin >> n >> m;
        int x, y, k;
        cin >> x >> y >> k;
        memset(b, 0, sizeof(b));
        memset(a, 0, sizeof(a));
        for (int i = 1; i <= n; i++)
        {
            for (int j = 1; j <= m; j++)
            {
                b[i][j] = (abs(i - x) + abs(j - y))*k;
            }
        }
        int t = -1; bool p = 0;
        for (int i = 1; i <= n; i++)
        {
            if (i % 2 == 1)
            {
                for (int j = 1; j <= m; j++)
                {
                    t++, a[i][j] = t;
                    if (a[i][j] >= b[i][j])
                    {
                        cout << a[i][j]; p = 1; break;
                    }
                }
            }
            else
            {
                for (int j = m; j >= 1; j--)
                {
                    t++; a[i][j] = t;
                    if (a[i][j] >= b[i][j])
                    {
                        cout << a[i][j]; p = 1; break;
                    }
                }
            }
            if (p == 1) break;
        }
        if (p == 0) cout << "Oh_Silly_Jelly";
        cout << endl;
    }
    return 0;
}

看似是dfs 实则不是;


#include<iostream>
#include<string.h>
#include<algorithm>
int a[51][51][1001], b[51][51];
using namespace std;
int main()
{
    int T; cin >> T;
    while (T--)
    {
        memset(a, 0, sizeof(a));
        int n, m, k;
        cin >> n >> m >> k;
        for (int i = 1; i <= n; i++)
            for (int j = 1; j <= m; j++)
                cin >> b[i][j];
        a[1][1][b[1][1]] = 1; int sum = 0;
        for (int i = 1; i <= n; i++)
        {
            for (int j = 1; j <= m; j++)
            {
                if (i > 1&&b[i][j]!=-1)
                {
                    for (int s = 0; s <= k; s++)
                    {
                        if (a[i - 1][j][s])
                        {
                            a[i][j][s + b[i][j]] =(a[i][j][s+b[i][j]]+ a[i - 1][j][s])%19260817;
                        }
                    }
                }
                if (j > 1 && b[i][j] != -1)
                {
                    for (int s = 0; s <= k; s++)
                    {
                        if (a[i][j - 1][s])
                        {
                            a[i][j][s + b[i][j]] =(a[i][j][s+b[i][j]]+ a[i][j - 1][s])%19260817;
                        }
                    }
                }
                sum = (sum + a[i][j][k]) % 19260817;
            }
        }
        cout << sum << endl;
    }
    return 0;
}
bfs内存超,dfs时间超,无奈;


#include<iostream>
#include<string>
#include<cmath>
#include<string.h>
#include<algorithm>
int b[1002][1002];
using namespace std;
int main()
{
    int T; cin >> T;
    while (T--)
    {
        double r1, r2, s;
        cin >> r1 >> r2 >> s;
        double r=abs(r1-r2), l = r1 + r2;
        while (l-r>0.000001)
        {
            double p = (r + l) / 2;
            double co1 = (r1*r1 + p*p - r2*r2) / (2 * p*r1), co2 = (r2*r2 + p*p - r1*r1) / (2 * p*r2);
            double th1 = 2*acos(co1), th2 = 2*acos(co2);
            double s1 = (th1*r1*r1 + th2*r2*r2)/2;
            double L1 = (r1 + r2 + p)/2;
            double s2 = sqrt(L1*(L1 - r1)*(L1 - r2)*(L1 - p))*2;
            double S = s1 - s2;
            if (S > s+0.000001) r = p;
            else l= p;
        }
        cout << (int)r << endl;
    }
    return 0;
}
又被忽悠了一回,一直在找公式。虽然也想到了二分,但没敢做。


最后一题我就先放这,以我这菜鸡水平就不瞎几把乱搞啦。

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