e,e,e!为啥全是青WA？？？？？？

AFwhcing @ 2020-10-05 12:31:09

#include<bits/stdc++.h>
using namespace std;
int main(){
    int n=1,k;double s=0;
    scanf("%d",&k);
    for(;s<=k;++n) s+=1.0/n;
    printf("%d",n);
    return 0;
}

by __LIHANSEN__ @ 2020-10-25 22:05:25

emm……lz对比一下我的吧

#include <iostream>
#include <cstdio>
using namespace std;
int K, N;
double Sum;
int main() {
//  freopen("sum.in", "r", stdin);
//  freopen("sum.out", "w", stdout);
    cin >> K;
    while(Sum <= K) {
        N++;
        Sum += 1.0 / N;
    }
    cout << N;
    return 0;
}

by CCF_AK_ME @ 2021-05-28 17:19:51

特判2 if(n==2) cout<<2<<endl; cout<<n-1<<endl; 3应输出11 k=3; 1+1/2+1/3+1/4+...+1/11=3又551/27720

by CCF_AK_ME @ 2021-05-28 17:21:54

3

#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n,k;
    double s=0;
    scanf("%d",&k);
    for(n=1;s<=k;++n) s+=1.0/n;
    if(n==2) cout<<n<<endl;
    printf("%d\n",n-1);
    return 0;
}