Compilare: user.cpp: In function ‘int main()’: user.cpp:190:9: warning: unused variable ‘tstart’ [-Wunused-variable] int tstart = clock(); ^ user.cpp: In function ‘void solve()’: user.cpp:85:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("mesaje.in", "r", stdin); ^ user.cpp:93:42: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets((char*)&linie, LMAX, stdin); ^ user.cpp: In function ‘void writeOutputData()’: user.cpp:173:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("mesaje.out", "w", stdout); ^