View Compilation Error

0_0_4600958_15977.cpp: In function `int main()':
0_0_4600958_15977.cpp:131: error: conflicting declaration 'long long int best'
0_0_4600958_15977.cpp:130: error: 'best' has a previous declaration as `int best'
0_0_4600958_15977.cpp:131: error: declaration of `long long int best'
0_0_4600958_15977.cpp:130: error: conflicts with previous declaration `int best'
0_0_4600958_15977.cpp:151: error: `cout' undeclared (first use this function)
0_0_4600958_15977.cpp:151: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_4600958_15977.cpp:151: error: `endl' undeclared (first use this function)