Compilare: main.cpp: In function 'void rapid_exponentiation(int)': main.cpp:68:35: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=] printf("%d\n",result.mat[0][0]); ^ main.cpp:67:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("kfib.out","w",stdout); ^ main.cpp: In function 'void read()': main.cpp:76:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("kfib.in","r",stdin); ^ main.cpp:77:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^