View Compilation Error

0_0_20781927_16615.cpp: In function 'int main()':
0_0_20781927_16615.cpp:3:3: error: '_int64' was not declared in this scope
 { _int64 sum[51]={0};
   ^
0_0_20781927_16615.cpp:5:1: error: 'sum' was not declared in this scope
 sum[0]=0;
 ^
0_0_20781927_16615.cpp:11:1: error: 'whil' was not declared in this scope
 whil e(scanf('%d',&N)!=EOF)
 ^