Borderou de evaluare (job #441740)

Compilare: user.cpp: In function ‘int main()’: user.cpp:8:15: warning: unused variable ‘k’ [-Wunused-variable] user.cpp:8:19: warning: unused variable ‘j’ [-Wunused-variable] user.cpp:8:50: warning: unused variable ‘ninv’ [-Wunused-variable] user.cpp:6:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:7:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result]