re市肾么洞悉吖

P1035 [NOIP2002 普及组] 级数求和

倪天灿 @ 2018-08-16 14:51:54

include<iostream>

include<cmath>

include<cstdio>

include<algorithm>

using namespace std; int main() { int k; cin>>k; double s=0.000000; for(double i=2;i<20000000000;i++) { s+=1/i; if(s>k) { cout<<i; break; } } return 0; }

by 倪天灿 @ 2018-08-16 16:06:30

5个wa

by zclclWJN @ 2018-08-16 16:06:53

@倪天灿额？

by zclclWJN @ 2018-08-16 16:07:24

@倪天灿有链接吗

by 倪天灿 @ 2018-08-16 16:09:03

要链接干什么

by zclclWJN @ 2018-08-16 16:10:01

@倪天灿我只想看看哪一题，5个wa看不出来

by 倪天灿 @ 2018-08-16 16:10:24

p1035

by zclclWJN @ 2018-08-16 16:13:48

@倪天灿

include<iosteam>

#include<cstring>
#include<string>
using namespace std;
int k,n = 0;
int main() 
{
    cin >> k;
    for(double i = 1;i <= k+1;i = i+1.0/n)
        ++n;
    cout << n;
    return 0;
}

by 倪天灿 @ 2018-08-16 16:18:15

@zclclWJN 写写大老

by 倪天灿 @ 2018-08-16 16:18:59

@zclclWJN 但是好像没iostream头文件

by zclclWJN @ 2018-08-16 16:19:22

你的代码没有从1开始

#include<iostream>
#include<cmath>
#include<cstdio>
#include<algorithm>
using namespace std; 
double k;
double s = 0.0;
int main() 
{ 
    cin >> k;
    for(double i = 1;i < 20000000000;i++) 
    { 
        s += 1/i; 
        if(s > k) 
        { 
            cout << i; 
            break; 
        } 
    } 
    return 0;
}