sumprod.cpp: In function 'int main()': sumprod.cpp:46: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result sumprod.cpp:47: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result sumprod.cpp:48: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result /usr/include/c++/4.4/bits/stl_algo.h: In function 'void go(int, int, int)': /usr/include/c++/4.4/bits/stl_algo.h:2178: warning: array subscript is above array bounds