Compilare: main.cpp: In function 'int main()': main.cpp:56:18: warning: unused variable 'j' [-Wunused-variable] int n, m, i, j, k, p, q, powk; ^ main.cpp:56:30: warning: variable 'powk' set but not used [-Wunused-but-set-variable] int n, m, i, j, k, p, q, powk; ^~~~ main.cpp:53:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("stramosi.in", "r", stdin); ^ main.cpp:54:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("stramosi.out", "w", stdout); ^