Compilare: user.cpp: In member function ‘Matrix Matrix::operator*(const Matrix&) const’: user.cpp:16:55: warning: narrowing conversion of ‘(((((long long int)((const Matrix*)this)->Matrix::a) * ((long long int)that.Matrix::a)) + (((long long int)((const Matrix*)this)->Matrix::b) * ((long long int)that.Matrix::c))) % 1000000000ll)’ from ‘long long int’ to ‘int’ inside { } [-Wnarrowing] return {(1LL * a * that.a + 1LL * b * that.c) % kModulo, (1LL * a * that.b + 1LL * b * that.d) % kModulo, ^ user.cpp:16:104: warning: narrowing conversion of ‘(((((long long int)((const Matrix*)this)->Matrix::a) * ((long long int)that.Matrix::b)) + (((long long int)((const Matrix*)this)->Matrix::b) * ((long long int)that.Matrix::d))) % 1000000000ll)’ from ‘long long int’ to ‘int’ inside { } [-Wnarrowing] return {(1LL * a * that.a + 1LL * b * that.c) % kModulo, (1LL * a * that.b + 1LL * b * that.d) % kModulo, ^ user.cpp:17:55: warning: narrowing conversion of ‘(((((long long int)((const Matrix*)this)->Matrix::c) * ((long long int)that.Matrix::a)) + (((long long int)((const Matrix*)this)->Matrix::d) * ((long long int)that.Matrix::c))) % 1000000000ll)’ from ‘long long int’ to ‘int’ inside { } [-Wnarrowing] (1LL * c * that.a + 1LL * d * that.c) % kModulo, (1LL * c * that.b + 1LL * d * that.d) % kModulo}; ^ user.cpp:17:104: warning: narrowing conversion of ‘(((((long long int)((const Matrix*)this)->Matrix::c) * ((long long int)that.Matrix::b)) + (((long long int)((const Matrix*)this)->Matrix::d) * ((long long int)that.Matrix::d))) % 1000000000ll)’ from ‘long long int’ to ‘int’ inside { } [-Wnarrowing] (1LL * c * that.a + 1LL * d * that.c) % kModulo, (1LL * c * that.b + 1LL * d * that.d) % kModulo}; ^