View Compilation Error

0_0_36478004_3576.cpp: In function 'int main()':
0_0_36478004_3576.cpp:15:21: error: 'long long' invalid for 'max1'
    long long double max1=0;
                     ^
0_0_36478004_3576.cpp:20:21: error: 'long long' invalid for 'c'
    long long double c=sqrt(m)/(t[i+1]-t[i]);
                     ^