Compilare: main.cpp: In function 'int main()': main.cpp:28:13: warning: unused variable 'j' [-Wunused-variable] int i , j , x , y , jj , st , dr , mij , sol ; ^ main.cpp:28:21: warning: unused variable 'y' [-Wunused-variable] int i , j , x , y , jj , st , dr , mij , sol ; ^ main.cpp:28:25: warning: unused variable 'jj' [-Wunused-variable] int i , j , x , y , jj , st , dr , mij , sol ; ^~ main.cpp: In function 'void boost()': main.cpp:19:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("scmax.in", "r", stdin); ^ main.cpp:20:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("scmax.out", "w", stdout); ^