Compilare: user.cpp: In function ‘void solve()’: user.cpp:15:9: warning: unused variable ‘sum’ [-Wunused-variable] int sum = 0 ; ^ user.cpp: In function ‘int main()’: user.cpp:41:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "diamant.in" , "r" , stdin ) ; ^ user.cpp:42:45: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "diamant.out" , "w" , stdout ) ; ^ user.cpp:43:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%d %d %d" , &n , &m , &x ) ; ^