Educational Codeforces Round 86 (Rated for Div. 2)

关于26日晚上的比赛,这几次打的都很差,特别是这场,A题秒思路,可是a,b数据范围为什么也是long long ,一直卡在第二个点上,至于到了B题,大约50分钟,把每个字符串都改成   01010101,可是样例都不了,但是题目里有句话没注意:

 k is the minimum positive integer with this property。。。。。最小正周期应该是不能再随意更改的吧

当时晚上直接心态崩掉,因为确实想法没错,细节上出了岔子,可能是平时练习光看题解的报应

 A. Road To Zero

题目链接:https://codeforces.ml/contest/1342/problem/A 

 #include 
    #include 
    #include 
    #include 
    #include 
    #include 
    #define rush() int T;cin>>T;while(T--)
    #define sf(a) scanf("%d\n",&a)
    #define sft(a,b) scanf("%d%d",&a,&b)
    #define go(a) while(cin>>a&&a)
    #define ms(a,b) memset(a,b,sizeof a)
    #define rep(i,a,b) for(int i=a;i<=b;i++)
    #define pf(a) printf("%.8lf",a)
    #define valu first
    #define num second
    #define E 1e-8
    using namespace std;
    typedef long long ll;
    typedef unsigned long long ull;
    const double pi=acos(-1.0);
    const int inf=0x3f3f3f3f;
    const int idata=1e6+5;
     
    int n,m,t;
    int maxx,minn;
    int i,j,k;
    //int a[idata],b[idata];
     
    int main()
    {
        cin.tie(0);
        iostream::sync_with_stdio(false);
        rush()
        {
            ull sum=0;
            ll x,y,a,b;
            cin>>x>>y;
            cin>>a>>b;
            maxx=max(x,y);
            minn=min(x,y);
            if(a*2>=b)
            {
                if(maxx==minn) sum=maxx*b;
                else
                {
                    sum=b*(minn);
                    sum+=a*(maxx-minn);
                }
            }
            else
            {
                sum=(minn+maxx)*a;
            }
            cout<

B. Binary Period 

题目链接:https://codeforces.ml/contest/1342/problem/B

 

    #include 
    #include 
    #include 
    #include 
    #include 
    #include 
    #define rush() int T;cin>>T;while(T--)
    #define sf(a) scanf("%d\n",&a)
    #define sft(a,b) scanf("%d%d",&a,&b)
    #define go(a) while(cin>>a&&a)
    #define ms(a,b) memset(a,b,sizeof a)
    #define rep(i,a,b) for(int i=a;i<=b;i++)
    #define pf(a) printf("%.8lf",a)
    #define valu first
    #define num second
    #define E 1e-8
    using namespace std;
    typedef long long ll;
    typedef unsigned long long ull;
    const double pi=acos(-1.0);
    const int inf=0x3f3f3f3f;
    const int idata=1e6+5;
 
    int n,m,t;
    int maxx,minn;
    int i,j,k;
    //int a[idata],b[idata];
 
    int main()
    {
        cin.tie(0);
        iostream::sync_with_stdio(false);
        rush()
        {
            int flag1=0,flag0=0;
            string s;
            cin>>s;
            for(i=0;i

 

 题目链接:https://codeforces.ml/contest/1342/problem/C

C. Yet Another Counting Problem

题意:给两个数a、b, 再给 q 个范围 l、r,问在 l~r 的范围中有多少个数x是 x % a % b != x % b % a ,输出符合条件的数的个数

 Educational Codeforces Round 86 (Rated for Div. 2)_第1张图片

    #include 
    #define rush() int T;cin>>T;while(T--)
    #define sf(a) scanf("%d\n",&a)
    #define sft(a,b) scanf("%d%d",&a,&b)
    #define go(a) while(cin>>a&&a)
    #define ms(a,b) memset(a,b,sizeof a)
    #define rep(i,a,b) for(int i=a;i<=b;i++)
    #define pf(a) printf("%.8lf",a)
    #define valu first
    #define num second
    #define E 1e-8
    using namespace std;
    typedef long long ll;
    typedef unsigned long long ull;
    const double pi=acos(-1.0);
    const int inf=0x3f3f3f3f;
    const int idata=1e6+5;

    ll n,m,t,a,b;
    int maxx,minn;
    int i,j,k;
    int pre[idata];
    ll calc(ll num){
        //在每一段长度为maxx的的区间内,存在0--b-1共b个数,使得式子相等
        ll cnt=num/maxx;
        //在剩下的最后一段中
        ll res=num%maxx+1;//num-cnt*maxx--num 区间内的数字   别忘了加一
        //可能存在满足条件的数的个数 res>b 的情况,强调一下是 个数
        return num-cnt*b-min(res,b);
    }
    int main()
    {
        cin.tie(0);
        iostream::sync_with_stdio(false);
        rush()
        {
            int q;
            cin>>a>>b>>q;
            if(a>b) swap(a,b);
            maxx=a*b/__gcd(a,b);
            minn=b;
            while(q--){
                ll l,r;
                cin>>l>>r;
                cout<

 


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之后的题连题解都看不懂了,之后更新

 

 

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