求助sos

#include <stdio.h>
int main() {
    int n, count = 0;
    double sum = 0;
    int j = 1; 
    double temp;
    scanf("%d", &n);
    while (sum < n) {
        temp = 1.0 / j; 
        sum += temp; 
        count++; 
        j++; 
    }
    printf("%d", count);
    return 0;
}

为啥80分 没过 求解